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[[quoteright:296:https://static.tvtropes.org/pmwiki/pub/images/monsters_inc_uk_poster.jpg]]
[[caption-width-right:296:''[[{{Tagline}} You won't believe your eye.]]'']]

->''"We're M.I. Monsters, Incorporated. We scare because we care."''
-->-- '''Henry J. Waternoose III, CEO'''

''Monsters, Inc.'' is the fourth animated film produced by Creator/{{Pixar}}. It is directed by Creator/PeteDocter, with the screenplay by Andrew Stanton and Daniel Gerson, and the story by Docter, Jill Culton, Jeff Pidgeon and Ralph Eggleston. It was released on November 2, 2001.

Welcome to Monstropolis, a city in a world where monsters are just regular folks like you and me. When they emerge from your closet and scare you, it isn't [[ForTheEvulz because it gives them any sort of thrill]], but simply because [[PunchClockVillain it is their job]]. Their world, [[PortalNetwork linked to ours through closet doors]], derives all its electrical power [[EmotionEater from our screams]].

However, scaring children isn't safe or easy work. The monsters believe that human children are highly toxic and only the bravest and most talented venture into a kid's bedroom. The populace live in terror of the possibility that a kid might find their way back through the door into the city, especially since this generation of kids are harder to frighten due to violence becoming more commonplace in media, and kids becoming desensitized, as a result. The difficulty in scaring children and the constant scrutiny of the CDA (Child Detection Agency) has led to a power shortage as Monsters, Incorporated, a major energy company using screams as their power source, struggles to keep the city lit.

Now meet our heroes, [[TheHero James P. "Sulley" Sullivan]] (Creator/JohnGoodman) and [[PluckyComicRelief Mike Wazowski]] (Creator/BillyCrystal). Sulley, [[GentleGiant the big blue one]], is the top "scarer" at Monsters Inc. Mike, the small green one, is his partner (who handles the paperwork), [[VitriolicBestBuds best friend]], personal trainer, and roommate, who spends his after hours courting the receptionist Celia Mae (Creator/JenniferTilly). They also happen to be days away from breaking the All Time Scare Record.

Life is great -- until one of the ''extremely'' poisonous fuel sources enters their world and threatens everything. Yes, '''a human child!''' Doom-doom-'''doom!''' (Actually, she is [[CheerfulChild rather adorable]].) Sulley and Mike's friendship becomes increasingly strained as they try to get the little "terror" back to her world without getting contaminated or arrested. Along the way, they stumble upon a conspiracy that threatens to undermine their life's work -- and possibly their lives.

A prequel was released twelve years later in 2013 titled ''WesternAnimation/MonstersUniversity'', which centers around Sulley and Mike in their college days.

A follow-up DVD short, ''WesternAnimation/MikesNewCar'', was released with the ''Monsters, Inc.'' DVD. There also is a comic book sequel titled ''ComicBook/MonstersIncLaughFactory''. A SpinOff [[RecycledTheSeries television series]] titled ''WesternAnimation/MonstersAtWork'' premiered on Creator/DisneyPlus in 2021, which is an ImmediateSequel set the day after the events of ''Monsters Inc.''. The world of the film was also featured in ''VideoGame/KingdomHeartsIII'' with an original story taking place after the events of the film.

'''Previews:''' [[https://www.youtube.com/watch?v=Ue_SfrHHBAc Teaser Trailer]], [[https://www.youtube.com/watch?v=8IBNZ6O2kMk Trailer]], [[https://www.youtube.com/watch?v=1gTnTnqqYdY Charades Trailer]]
----
!!''Monsters, Inc.'' provides examples of:

[[foldercontrol]]

[[folder:Tropes A-B]]
* AccidentalKidnapping: Randall, after bringing Boo's door to the Scare Floor for Sulley and Mike, traps Mike into a box and takes him away after Mike steps into the room and makes him think that he is actually Boo, whom Randall was baiting out. Randall doesn't realize this (even commenting the kid's put on a couple of pounds) until he tips the box over and ''Mike'' is the one who falls into the chair.
* AccidentalVentriloquism: Sulley sees part of Boo's disguise go down a trash chute and thinks she's been crushed into a cube. Meanwhile, Boo wanders into a group of monster children on a field trip. Sulley presents the garbage cube to Mike just as the kids are walking down the hall.
-->'''Sulley:''' ''(Weeping)'' I can still hear her little voice!\\
'''Boo:''' Mike Wazowski!\\
'''Mike:''' Hey, I can hear her too.\\
'''Other kids:''' Mike Wazowski!\\
'''Mike:''' How many kids you got in there?
* ActingUnnatural: Sulley and Mike try to help a disguised Boo back to her door on the scare floor without looking suspicious.
-->'''Mike:''' We're just two regular joes on our way to work. We will blend right in.\\
''(Sulley and Mike enter the scare floor)''\\
'''Sulley:''' Top of the mornin', fellas!\\
'''Mike:''' Hey, what's shakin', bacon?\\
'''Sulley:''' Did you lose weight? Or a limb?
* ActorAllusion:
** [[Creator/SteveBuscemi Randall]] threatens his assistant with, "If I don't see a door in my station in 5 seconds, [[Film/{{Fargo}} I will personally put you through the shredder!]]"
** In a [[https://www.youtube.com/watch?v=vZIY2-kH-wE teaser trailer]], Sulley and [[Creator/BillyCrystal Mike]] play Charades, and one of Mike's guesses is [[Film/WhenHarryMetSally "When Harry Met Sulley"]].
** Mike imitates an umpire when he and Sulley dispose of Randall, alluding to Billy Crystal's well-known love of baseball.
** The monster Fungus is performed by Creator/FrankOz, who performed several well known monsters on ''Series/SesameStreet'', particularly Grover and Cookie Monster.
* AerosolSprayBackfire: While hiding Boo in Sulley and Mike's apartment from the authorities, Mike tries keeping her away from him with a can of aerosol spray, only to wind up accidentally [[EyeScream spraying himself in the eye]] with it.
* AlasPoorVillain: One can't help but feel sorry for Waternoose, who only wanted to save his family's company and ensure Monstropolis still had power, except that his methods for going about it weren't the best. Still, his fate of going to jail was at least better than being banished like Randall.
* AllAnimalsAreDogs: Sulley tries to get Boo's attention by getting her to fetch a toy "bear", and makes a bed for her out of newspaper in the corner. [[CharacterDevelopment He learns to treat her better.]]
** Mike also joins in by telling her to go fetch a stick. [[CharacterDevelopment He, too, learns his lesson.]]
* AllCGICartoon: One of the first feature-length examples of the twenty-first century.
* AllForNothing:
** The point of the CDA's decontaminations, when it is discovered that humans and their possessions are not toxic after all. They put a force field around a building, just because a human kid was in it, as an 835 call, for crying out loud!
** Randall and Waternoose's EvilPlan ultimately proved pointless after the monsters discovered an alternative, more ethical method of gaining energy. Both monsters' lives were disgraced and ruined due to clutching the VillainBall.
* AllMythsAreTrue: Cryptids such as the Loch Ness Monster and Bigfoot are actually ex-citizens of Monstropolis who have been banished to the human world.
* AllThereInTheManual: Boo's full name. It is [[TheDanza Mary Gibbs]]. Her first name is revealed in the film, since she signs all her sketches, but it is hard to spot.
* AlwaysSecondBest: Randall Boggs is always the second best performer on the Scare Floor behind James Sullivan. This explains why Randall is eager for the evil plan to topple Sullivan even before James and Mike are aware of the operations.
* AmazingTechnicolorPopulation: Many monsters have a clear animalistic appearance that have an unnatural color scheme. Here are some examples:
** Sulley, who is blue and resembles a bear.
** Randall, who is purple and looks like a lizard and a snake.
** Celia's hair, which consists of five purple rattlesnakes.
** Waternoose, who is gray and looks like an arachnid and a crustacean.
** Many other monsters are in bright colors--Mike is a light green, Celia mentioned above is purple, and George is orange with yellow stripes, among other examples.
* AmusingInjuries: Mike is frequently subjected to these throughout the movie. The amusement they bring to Boo is actually a plot point as they eventually realize that Boo’s laughter at these amusing injuries is a more powerful energy supply than traditional screams.
* AnythingButThat: When the CDA enter the Scare Floor on a 2319 call, Waternoose groans, "Oh, not the CDA."
* ArtisticLicenseHistory: After George Sanderson gets subjected thrice to "code 2319" indignities, his assistant tells him that he'll next be sent on an easy scare job in, "Nice... quiet.. ''Nepal''." In reality, during the film's production, Nepal had been embroiled in [[https://en.wikipedia.org/wiki/Nepalese_Civil_War civil war since 1996]]. And four months before the film's November 2001 release, the King and Queen and eight other members of the royal family were killed in [[https://en.wikipedia.org/wiki/Nepalese_royal_massacre a bizarre massacre in the royal palace]].
* AstonishinglyAppropriateInterruption: "I said… ''Sulley?!''"
* BabySeeBabyDo:
** When Sulley shushes Boo, she copies the gesture and says, "Shh!" back.
** When Mike does a rambling speech that involves his name, Boo repeats it and she ends up liking to say his name, even giving it when asked, "What's your name?".
* BadBoss: Randall is very rude and abrasive toward his assistant Fungus, their relationship being [[{{Foil}} totally opposite]] to [[HeterosexualLifePartners Sulley and Mike's.]] It is telling that when Fungus is seen at the end without Randall, he is much happier.
* BadToTheLastDrop: Whatever it is they drink instead of coffee, it is a thick sludge that slowly oozes out of the dispensers.
* BaitAndSwitchComment: Mike has a RunningGag where he sees some bit of publicity with his face obscured and says things like, "I don't believe it... I'm on TV!"
* BenevolentMonsters: The monsters scaring children at night is just business. They would be perfectly content to leave humans alone if they weren't dependent on screams for energy. Indeed, when Sulley accidentally scares Boo, he realizes through her trauma just how he's been appearing to so many children in the past. When he switches the company to laugh power, he and the other monsters are a lot happier.
* BigBad: Randall seems to be this at first, as he plots to kidnap children which to use a Scream Extractor machine on to solve the energy crisis for the sake of becoming rich and famous, but then turns out he's been employed by Mr. Waternoose, who takes over the role when Randall is beaten.
* BigBadDuumvirate: Randall and Waternoose are responsible for the danger in this plot as a team and Sulley and Mike must stop their plans to kidnap children.
* BigDamnHeroes:
** Sulley, to save Boo from the Randall's machine.
** Boo herself returns the favor when she beats the snot out of Randall to stop him from making Sulley [[DisneyVillainDeath fall to his death]].
%% Administrivia/ZeroContextExample entries are not allowed on wiki pages. All such entries have been commented out. Add context to the entries before uncommenting them.* BigGood: Roz
* BigNo:
** Mike yells one in the teaser trailer after he requests Sulley to open the door.
** Sulley lets one out when he sees the trash that he thinks has Boo inside it about to go through the trash compactor. It is muffled behind a sheet of glass.
** Sulley, seven times after he and Mike are banished, six of which are one after the other as Sulley repeatedly opens and slams the door.
** Randall when Sulley hurls him through a door in the door vault to banish him.
** Sulley when Waternoose knocks him down and attempts to kidnap Boo in the scare simulator.
* BigRedButton: The scare floor has a red panic button in case a contamination alert arises. When Charlie calls for a 2319, Jerry activates the alarm and the CDA is summoned.
* BigShutUp: Needleman to Smitty at the beginning.
-->'''Smitty:''' Go get 'em, Mr. Sullivan!\\
'''Needleman:''' Quiet! You're making him lose his focus.\\
'''Smitty:''' Oh, no. Sorry!\\
'''Needleman:''' ''Shut up!''
** It goes further in the HilariousOuttakes segment, where Smitty ends up BreakingTheFourthWall.
* BigWhat: Mike to Sulley in the door vault after doing a flip and landing [[GroinAttack on his crotch on a girder]], and Sulley noticing too late that Boo's costume covered her face so she didn't see the flip, so he hurt himself for nothing.
* ABirthdayNotABreak: Celia's birthday date at Harryhausen's is thrown into disarray when Sulley intrudes midway through and accidentally releases Boo inside the restaurant. Celia herself is forced to wear a ConeOfShame afterwards and is naturally furious with Mike over her ordeal, calling it one of the worst nights of her life.
* BlackComedy:
** Sulley watching what he thinks is Boo go through through increasingly more outlandish trash compacting methods. Of course, the audience knows she is not in there.
** Late in the movie, Mike tries to apologize to Sulley for refusing to help him in the Himalayas. The only problem is that Randall is currently [[CurbStompBattle beating up Sulley]] while invisible, with Mike being [[ShutUpAndSaveMe completely oblivious]] even as Randall is about to ''choke him to death''.
** The reoccurring gag of the CDA attacking George Sanderson also applies, especially as he gets more and more injured as the movie goes on.
* BlaseBoast: Mike when talking to Celia at the beginning:
-->'''Celia:''' So, uh, are we going anywhere special tonight?\\
'''Mike:''' Ah, I just got us into a little place called, um, Harryhausen's.\\
'''Celia:''' ''(gasps)'' Harryhausen's!? But it's impossible to get a reservation there!\\
'''Mike:''' Not for googly-bear.
* BlowingARaspberry: Boo blows one when Randall is banished.
* BookEnds: A musical example. The closing credits' theme, "If I Didn't Have You", is actually a remix of the opening credits' theme.
* BoringButPractical: Mike wants to drive Sulley to work in his red convertible, but Sulley insists that, because of the energy crisis, they walk.
-->'''Mike:''' Okay, Sulley, hop on in.\\
'''Sulley:''' Nope. Uh-uh. Uh-uh. ''[Keeps walking.]''\\
'''Mike:''' Hey, hey, hey, hey... where ya going? What are you doing?\\
'''Sulley:''' Mikey, there's a scream shortage. We're walking.\\
'''Mike:''' ''Walking?''\\
'''Sulley:''' Yep.\\
''[Mike tries to climb into the car. Sulley grabs him by the arm, trying to pull him off.]''\\
'''Mike:''' No! Uh, no, no!\\
'''Sulley:''' Come on.\\
'''Mike:''' My baby! Look, she needs to be driven!\\
''[Sulley pulls him off and drags him along, with Mike calling back to the car.]''\\
'''Mike:''' Bye, baby! Uh, I'll call you!
* BowelBreakingBricks:
** After nearly being discovered by Randall in the bathroom, we see a huge splash in the stall Sulley, Mike, and Boo are hiding in. Boo sums it up best.
--->'''Boo:''' Ew.
** [[SubvertedTrope And then in the next scene, we see an up-close shot of Mike's legs completely soaked.]] [[DontExplainTheJoke It is implied he slipped and fell in, with Boo still understanding how gross that was.]]
* BreakUpMakeUpScenario:
** Sulley has one both with Boo (after accidentally scaring her) and Mike (who blames him for their banishment).
** Mike has one with Celia (over his absence ever since their last date) soon as she sees Randall in pursuit.
* BrickJoke:
** Sulley and Mike are arguing about Boo on Scare Floor F, when Mike realizes mid-sentence that everyone is watching. He tries to spin his line "Put that thing back where it came from or so help me...!" as practice for the company play. During the credits, the cast performs "Put That Thing Back Where It Came From Or So Help Me: TheMusical."
** Mike then tells confused scare floor workers and CDA agents, "we'll need ushers." At the end, a CDA agent is working as an usher.
** Sulley puts the stuff from Boo's room in a locker. Guess who opens that same locker a few scenes later?
** The first scene in the first issue of ''Laugh Factory'' is a new company commercial, this time ending with the logo on ''Sulley's'' face instead of Mike, much to his chagrin.
* BrokenPedestal: Waternoose becomes this to Sulley when the latter finds out the former's plans to kidnap children to solve the energy crisis.
* BruiserWithASoftCenter: Top scarer James P. Sullivan has SuperStrength and a mighty roar, but is really a sweet guy under it all.
* ButtMonkey: Mike, which cracks up Boo to no end.
[[/folder]]

[[folder:Tropes C-D]]
* CallASmeerpARabbit:
** Boo affectionately calls Sulley "[[CuteKitten Kitty]]."
** "Little Mikey", the stuffed animal that Mike doesn't want Boo touching, is described as a bear (despite having one eye, several legs/tentacles, fangs and horns).
* CallingYourNausea: Mike says, "I'm gonna be sick!" while riding on the door vault, but he never vomits.
* CassandraTruth: A {{subverted|Trope}} example occurs when Celia demands that Mike tell her what's going on, which he does. Barely an instant after asking Mike if he expects her to believe it, Celia sees Boo, then the pursuing Randall, and realizes that Mike ''is'' telling the truth.
* CastingGag: Possibly unintentional, but in ''Film/TheBigLebowski'', Creator/JohnGoodman's character is an overconfident {{Jerkass}} with a HairTriggerTemper and Creator/SteveBuscemi's character is an affable NiceGuy. In this film, the two actors have essentially swapped characters, as Sulley (Goodman) is a GentleGiant and Randall (Buscemi) is pretty much a CardCarryingVillain[[note]]Especially funny since Goodman's character in ''Lebowski'' was constantly bullying Buscemi's character[[/note]].
* CasualDangerDialogue: After Randall has kidnapped Mike (mistaking him for Boo) and has him cornered in a chair:
--> '''Randall:''' Where is it, you little one-eyed creh-tin!?\\
'''Mike:''' Okay, first of all, it's ''cretin''. If you're gonna threaten me, do it properly.
* TheCatCameBack: Boo, when she first meets Sulley.
* ChangedMyMindKid: After both get exiled to the Himalayas, Mike angrily abandons Sulley over the latter essentially ruining his life and constantly ignoring him in favor of Boo. He rejoins Sulley a few minutes later, just in time to [[BigDamnHeroes save him from Randall]].
* CheatedAngle: The closet doors. When closed, they are almost always seen directly from the front. But when open, they are almost always seen from an angle. And they are only rarely seen from behind, mostly after Sulley and Mike are sent away to the Himalayas, but there are a couple of other exceptionally brief glances.
* CheerThemUpWithLaughter: After all of her mishappens in the monster world, little Boo is terribly scared. Seeing that she has previously found Mike suffering {{Slapstick}} Comedy hilarious, Sulley gets Mike to do just that in order to make Boo feel better.
* ChekhovsBoomerang: The scare simulation room seen in the opening comes back twice, both times causing major plot relevations. The first time it comes back, Sulley accidentally scares Boo and Waternoose's treachery is revealed, while the second time the room's cameras are used to capture Waternoose's AccidentalPublicConfession.
* ChekhovsGun:
** Boo's laughter is shown to be powerful enough to blow the power for an entire city block. Guess what becomes the new power source for the company.
** Socks (supposedly) being toxic to monsters. First used as part of a gag to illustrate how serious the CDA are about avoiding contamination, then during the climax, Mike throws a sock at one of the agents to distract them.
* ChekhovsSkill:
** Boo's ability to say "Mike Wazowski."
** It is noted throughout the film (and through its prequel) that most of the monsters aren't naturally scary, Mike being the stand-out example, and when caught off guard can even evoke joy or laughter from the children they victimize. This ends up becoming ''very'' pivotal during the end.
* TheChewToy: George Sanderson, as a RunningGag, keeps getting articles of clothing caught on his fur, resulting in numerous humiliating 2319 calls. Sometimes Mike, although it is usually his own fault.
* ComicallyMissingThePoint:
** At one point, Sulley protests about Boo being in the restroom, not because she is human, but because she is a girl in the men's bathroom.
--->'''Mike:''' That is the weirdest thing you have ever said.
** Mike later, when Randall is trying to make a deal with him.
--->'''Randall:''' What happens when the whistle blows in five minutes?\\
'''Mike:''' Uhh, I get a time-out?\\
'''Randall:''' Everyone goes to lunch! Which means the Scare Floor will be...\\
'''Mike:''' ...Painted?\\
'''Randall:''' EMPTY! It'll be empty, you idiot!
** Also, when Mike tries to apologize to Sulley while remaining completely oblivious to the fact that Sulley is being beaten up by an invisible Randall.
--->'''Sulley:''' I'm being attacked!\\
'''Mike:''' No, I'm not attacking you. I'm trying to be honest.\\
'''Boo:''' ''[runs up and tries to babble at Mike frantically]''\\
'''Mike:''' I know kid, he's too sensitive!
** When Celia angrily confronts Mike the day after the raid at Harryhausen's in which she got injured, Mike thinks it's because Celia did not like sushi.
* ComicallySmallBribe: When Mike is strapped into the Scream Extractor, he decides to bribe Fungus with his red convertible, but reconsiders giving him the car mid-sentence.
-->'''Mike:''' Psst, Fungus. Fungus? You like cars? Huh? 'Cause I got a really nice car. You let me go, I'll give you... [[LastSecondWordSwap a ride, in the car]].
* ComicBookAdaptation:
** Creator/DarkHorseComics published a one-shot comic that adapted the events of the film.
** Boom! Studios did a {{sequel}} of sorts in a four-issue miniseries titled ''ComicBook/MonstersIncLaughFactory'', which featured Randall's return, Mr. Waternoose's escape from prison, Sid Phillips from ''WesternAnimation/ToyStory1'' using the closet doors to his advantage, and the subsequent team-up of the three.
* CompanyCrossReferences:
** Among the toys seen in Boo's room are Jessie and the ball with the star design from ''Franchise/ToyStory'', and Nemo from ''WesternAnimation/FindingNemo'' (which hadn't released yet).
** The outtakes feature Rex from ''Toy Story'' in place of a giant monster who appears in the film proper waiting near the street.
* ConeOfShame: Monsters who undergo decontamination by the CDA due to a 2319 or 835 call end up wearing one. Celia's hair snakes all get individual cones in addition to the one she has to wear around her neck.
* ConfusedBystanderInterview: After Boo's presence is discovered, "witnesses" claim to have seen her use laser vision and mind powers.
* ConvenientPhotograph: When Randall asks Mike about the human, Boo, that was spotted in the sushi restaurant, Mike lies that he was nowhere near the restaurant and throws suspicion at a coworker, so that he and Sulley can get Boo back home before the authorities bust them for illegally harboring a human. As they walk towards the scare floor to get Boo's door, Celia, Mike's girlfriend angrily berates him for running away [[ConeOfShame and leaving her to get processed]] when the authorities burst into the restaurant. Hearing the scolding, Randall then notices that the newspaper has picture taken inside the restaurant that shows Mike making a break for it.
* CoolGate: Closet doors in childrens' bedrooms are these when activated from the monster's side.
* CopycatMockery: When Randall asks Mike if he hears the "winds of change" (referring to him beating Sulley), Mike repeats it in a mocking voice.
* CorporateConspiracy: The conspiracy at Monsters, Inc. was set into motion by a few bad apples rather than the whole corporation, but it still counts — Randall Boggs along with Henry J. Waternoose III formulates a plan to solve the coming energy crisis by kidnapping children and subjecting them to the Scream Extractor, all while maintaining the superstition that humans are poisonous.
* CorruptCorporateExecutive: Mr. Waternoose is all but determined to keep his company from going into the red ink, even if it means breaking the law.
* CreatorCameo: Director Pete Docter voices the CDA agent who announces that Harryhausen's is ready for decontamination as part of an 835 call.
* CurbStompBattle:
** Sulley and Randall's first battle is barely even that: Randall turns invisible and effortlessly [[NoHoldsBarredBeatdown beats the crap out of Sulley]] before choking him to near-death. Only [[AccidentalHero Mike's intervention]] stopped him from outright killing Sulley.
** Boo versus Randall.
* CutTheJuice: Randall tries to use the Scream Extractor to coerce Mike into telling where Boo is. As the extendable mask-like part of the machine gets closer and closer to him, Mike begins panicking and even attempts to purse his lips in a futile attempt to stop it. Sulley, who has been watching from hiding, secretly unplugs the machine before it can do anything else, then frees Mike while Randall is checking the power source.
* {{Cyclops}}: Mike, his "teddy bear" Little Mikey, and Celia are the most prominent examples. There are several other one-eyed monsters that appear as background characters.
* DangerDeadpan: Upon mistaking Randall for a gator, a teenage boy reports "Mama! Another gator got in the house," with no more excitement in his voice than as if he was announcing a pizza delivery.
* TheDarknessGazesBack: In the opening.
* DeadpanSnarker: Mike. Also Roz, whose incredibly deadpan voice often gives Mike the creeps.
-->'''Roz:''' And I'm ''sure'' you filed your paperwork correctly... for once.\\
''[A {{Beat}} as Mike's eyes widen in horror.]''\\
'''Roz:''' [[SarcasmMode Your stunned silence is very reassuring.]]
* DeathGlare:
** When Sulley scares Boo by accident and doesn't notice until it is too late.
** Randall to Waternoose after the line: "Sullivan was ''twice'' the Scarer you will ''ever'' be!"
** Finally, when Boo is about to attack Randall in the door vault.
* DeepSouth: Randall's final fate is getting trapped in a trailer and getting wailed on by a swamp lady who thinks he is an alligator.
* DefendsAgainstTheirOwnKind: Sulley and Mike go to great lengths to keep Boo safe from authorities.
* DesignStudentsOrgasm: The opening credits.
* DestroyTheVillainsWeapon: Downplayed. Sulley doesn't destroy the Scream Extractor so much as break it off from a part holding it upwards and throw it at the villains.
* DetachableDoorknob: The original story treatment concerns Johnson as he tries to scare one more kid to save his job. However, as he enters Mary's bedroom, he accidentally breaks the doorknob and tries to fix it. After Mary ambushes him (thinking it's one of her brothers trying to prank her) and accidentally gets whisked away to the Monster World, Johnson tries to open the door to return her to her world. Unfortunately, the doorknob on the other side breaks as well and the door has to be sent to the repair department.
* DidYouActuallyBelieve: Mike and Randall.
-->'''Randall:''' (''evil chuckle'') You still think this is about that stupid scare record?\\
'''Mike:''' Well, I did... right up until you ''[[LampshadeHanging chuckled]]'' like that...
* DishDash: Of the spinning dishes on sticks variety.
* DisneyVillainDeath: During their confrontation in the door factory, Randall attempts to kill Sulley this way by knocking him out of a door and almost sending him falling to his death. Only Boo's intervention stops it.
* DoesThisRemindYouOfAnything: Randal interrogates Mike in the hallway a lot like a [[TheMafia mafia]] hit man, getting in his face, making him answer his own questions, mild-but-threatening violence and even giving him a "''capisce''" hand gesture when he asks if he'd made himself clear.
* DogPileOfDoom:
** CDA agents pounce on George in the locker room after he opens the door to his locker and the [[BrickJoke toys Sulley shoved in there]] fall on him.
** Immediately after Sulley and Mike get a disguised Boo through the swarm of CDA agents in the lobby, a detector machine squeals and a bunch of agents chase a random factory worker offscreen. Going by the dialogue, leaping CDA agents and [[OffscreenCrash thumping sound effects]], the factory worker is [[ImpliedTrope presumably]] dogpiled. [[FromBadToWorse Then]] something that sounds an awful lot like a dentists drill starts up.
--->'''Agent 1:''' Halt! Stop him!\\
'''Agent 2:''' Hold him down.\\
''(Worker screams as the drill starts up)''
* DontCallMeSir: The easygoing Sulley has a brief moment asking ThoseTwoGuys not to call him Mr. Sullivan.
* DontLookDown: Stated by Sulley early on in the door vault scene (shortly before the rollercoaster drop).
* DoorHandleScare: After managing to capture Boo, Sulley goes back to her door to send her back, and as he reaches for the knob it suddenly starts to turn. The next shot is of Sulley's rival, Randall, coming out of the door. He deactivates the door, and as it is lifted up to be stored away, it leaves Sulley, who had been hiding behind the door, exposed. Thankfully, Randall never looks back.
* TheDoorSlamsYou: Happens twice to Randall in the door vault. The first door that Sulley, Mike, and Boo go through is slammed just as he reaches it. A little later, Mike slams another door in his face, trapping two of his antennae ("I hope that hurt, lizard boy!").
* DramaticIrony: [[PlayedForLaughs Played heavily for laughs]]. In a ShoutOut to ''WesternAnimation/FeedTheKitty'', Sulley believes Boo to be trapped in the trash compactor during one scene, and looks horrified as he believes Boo is being mutilated in the [[BlackComedy most horrible ways imaginable.]] The audience already knows Boo got away and she's just fine.
[[/folder]]

[[folder:Tropes E-F]]
* EasilyForgiven: Fungus's presence on the laugh floor indicates as much. Justified seeing that he was under Randall's thumb and stops being that way after Randall's defeat.
* EiffelTowerEffect: During the "Chase Through Doors" section Sulley, Mike and Boo run through rooms that have views on [[UsefulNotes/{{Japan}} Mt. Fuji]] and [[UsefulNotes/{{France}} the Eiffel Tower]].
* EmbarrassingAdGig: Subverted. When Mike's one shot on the new company ad has his face covered up by the logo, he at first appears shocked and disappointed. But then he shouts enthusiastically "I was on TV!"
* EmotionEater: The entire world is powered by children's screams of fear. As they discover later, though, they get ''more'' power from laughter.
* EmployeeOfTheMonth: In the early part of the movie, we see that Monsters Inc. has an employee of the month program; and every single one was won by James P. Sullivan.
* EngineeredPublicConfession: Mr. Waternoose's near the end of the film.
* EsotericHappyEnding: {{Discussed|Trope}} InUniverse. Mike mentions that even though he and Sulley saved Boo, they destroyed the company, put their fellow employees out of a job, and doomed Monstropolis to a powerless fate. Or at least, they ''would'' have, if he didn't give Sulley the idea to switch to laugh power.
* EtTuBrute: How Sulley felt towards his mentor and close friend Waternoose.
* EurekaMoment:
** When Mike said that he and Sulley would have to start a whole new life far away to keep from getting killed by Randall, he says "Goodbye, Mr. Waternoose!", which gives Sulley the idea to go to Waternoose for help. Subverted when it is revealed that Mr. Waternoose was in on the scheme. Still, ItSeemedLikeAGoodIdeaAtTheTime.
** Then again, towards the end of the film:
--->'''Mike:''' At least we had some laughs, right?\\
'''Sulley:''' Laughs...
* EveryoneHasStandards: The whole monster world might scare children as an energy source, but they would never ''hurt'' a kid. And the idea of kidnapping them is not only a crime, but seen as just plain wrong.
* ExtraEyes: Several monsters, mostly background characters, have more eyes than the average mammal, bird, or reptile. The most prominent ones are Waternoose and Fungus, who have five and three eyes, respectively. The monster with the highest amount of eyes is the green "witness" of Boo's attack on Harryhausen's, who has twenty eyes in total!
* ExtremelyShortTimespan: The bulk of the film takes place over the course of two days.
* EyeScream:
** When Boo sneezes on him, Mike [[IdiotBall sprays his eye with disinfectant]], leaving it looking very irritated.
** One of Mike's attempts to make Boo laugh is [[ThisIsGonnaSuck reluctantly]] self-inflicted: pulling his eyelid and snapping it like an elastic band against his eyeball.
* TheFaceless: Every CDA member, with the exception of #001: Roz.
* FaceplantingIntoFood: When a commercial mentions that kids are getting harder to scare, a clip is shown of a boy sleepily watching a movie and faceplanting into a bowl full of cereal.
* FailedAttemptAtScaring: A major plot point is that today's kids are harder for the monsters of M.I. to scare, resulting in an energy crisis caused by a scream shortage. Not helped by the fact that monsters think human kids are extremely toxic, making their jobs even tougher.
* FaintInShock: When Sulley watches ([[DramaticIrony what he thinks is]]) Boo getting crushed in the trash compactor, he faints four times: First after seeing the trash being pounded by two big hammers, again after seeing it being rolled flat, a third time after seeing it being chopped into cubes, and a fourth time when the cubes come out and he makes to try and pick up the one that he thinks has Boo inside it.[[note]]This a ShoutOut to ''WesternAnimation/FeedTheKitty'', when Marc Anthony thinks that Pussyfoot is being baked into cookies.[[/note]]
* FastRoping: How [[TheMenInBlack the CDA, or Child Detection Agency]], enter a scare floor when the 2319 alarm is pulled. [[HilariousOuttakes With varying degrees of success.]]
* FightingAcrossTimeAndSpace: Toward the end, Mike and Sulley are chased by Randall, who wants to take possession of Boo. This takes place in the PortalNetwork door factory where every door leads to a different room on Earth, so they go through a number of different locations while trying to outrun Randall. It's also a DontLookDown situation because the door factory production is very high up and the fall would be fatal. Randall eventually takes Boo from Mike and Sulley but is bested when, while trying to HandStomp Sulley off the door's edge, Boo sneak-attacks Randall from behind. Mike and Sulley throw Randall into a door leading to a swamp house, where he is mistaken for an alligator and beaten with a shovel, and Mike and Sulley shatter the door from the "outside."
* {{Fingore}}: Happens to Mike twice, first when Roz closes the window to the help desk on his fingers, then when a kid bites his index finger.
* FirstNameBasis: Mr. Waternoose is the only character to refer to Sulley by his first name, James. Randall does it once while talking to Mike and he himself is referred to only by his first name and we only find out his surname of Boggs from Celia.
* FiveSecondForeshadowing: At one point, this exchange occurs:
-->'''Waternoose:''' ''(lecturing a group of trainee Scarers)'' How many times do I have to tell you? It's all about presence. About how you enter the room!\\
''(cue [[DynamicEntry Sulley and Mike bursting in]])''
* FlushTheEvidence: After he attempts to put Boo back in her room, Sulley gets some of her toys tangled around his person. He tries to flush them all down the toilet, [[SubvertedTrope but it gets backed up]], so instead he hides them inside a locker, [[BrickJoke where they reappear later in the movie.]]
* {{Foreshadowing}}: Used several times throughout the film.
** In the company commercial, Waternoose mentions research into new energy techniques. This apparently includes a means to extract screams from children.
** "James, this company has been in my family for three generations. I would do anything to keep it from going under." Up to and including kidnapping children to harvest their screams, even.
*** Waternoose's involvement in the EvilPlan is made apparent by the very existence of the secret door and the scream extractor underneath the factory. Even if Randall could have built the machine himself from parts scavenged around the factory and making use of the abundance of Scream canisters, there is no way he would have been able to set up such an elaborate concealment method for the entrance without being caught unless he also had aid from the owner of the factory himself.
** "I'm always watching you, Wazowski. Always watching. ''Always''."
** "Just think about a few names, will ya? Loch Ness, Bigfoot, ''The Abominable Snowman''. They all got one thing in common: banishment! We could be next!" Guess who Sulley and Mike meet after they get banished?
** Boo's crying causes the lights to flicker in Sulley and Mike's apartment because, of course, screams of children are what are used as power in the monster world. However, her laughter causes a much stronger overload to the point of causing a total power failure. This is how Sulley discovers that laughter is more powerful than screams.
** Mike's line to Sulley in the locker room: "There's more to life than scaring."
** When Sulley assures Boo that no monster will come out of his closet to scare her while she is sleeping in his bed, he says that he won't either because "[he's] off-duty." He accidentally scares her while he is on duty later.
** While hiding from Randall and Fungus in the bathroom, Randall tells Fungus to get "the machine" up and running, and that he (Randall) will take care of Boo. Said machine turns out to be the scream extractor which appears later that day.
** An extremely subtle one, but when Mike is running away from Randall (who is shown lying in wait for Mike), Randall is camouflaged right near one of Mr. Waternoose's portraits. Randall and Waternoose were later revealed to be working together.
** "One of these days... I'm going to let you teach that guy a lesson."
** Boo reveals through her drawings that Randall is the monster assigned to her, and is thus the best designated to scare her out of the ''entire company''. This becomes relevant much later when Randall becomes her, Sulley, and Mike's biggest threat and Boo is initially too scared to help.
** During the first 2319 and the first time the CDA show up, Roz slams the front panel of her desk shut. She later slams it shut [[AmusingInjuries on Mike's fingers]] after he reveals that Randall was working the scare floor the previous night while trying to get the card to Boo's door. The very next scene in the restroom opens with Randall being questioned by some CDA agents. At the end of the film it is revealed she is the head of the CDA.
** Randall's comment to Sulley and Mike about "the winds of change" seems like a random taunt, but then it is revealed he is the mastermind of the Scream Extractor, which he claims will "revolutionize" the scaring industry.
** Waternoose having SuperStrength on par with, or even eclipsing, Sulley's gets subtly teased when we first meet him. During his demonstration of screams being the monster's source of power, Waternoose casually holds a canister in one hand and is able to gesture with it like it was a pencil, while many other characters are seen straining to lift them.
** Throughout the film, every time a door goes online, we are purposefully shown the light above it going on, even within the Door Vault. When Sulley tricks Waternoose in the simulator room, we aren't shown the light on Boo's door, which only the most attentive viewers will actually catch, since Sulley deliberately works a keypad.
*** However, ''super'' attentive viewers might also notice that he actually presses a different button on the keypad than the one we've seen other characters use to activate a door.
** The few times Boo touches Sulley and vice versa, and when Boo's things dangle from Mike, they do not seem to suffer anything deadly; they are noticeably fine, even after hours. This is the first clue that children are not toxic as monsters thought.
* ForWantOfANail: If Mike hadn't forgotten to file his paperwork, Sulley wouldn't have found Boo, and Randall and Waternoose would never have been discovered.
* FourFingeredHands: In true American animated fashion, an average monster in this world has four digits on each hand. Sulley, Mike, and supporting characters like the Abominable Snowman, Fungus, George, Smitty, and Needleman showcase this.
** However, this being a world of monsters of various appearances, several characters avert this. Randall, Roz, and the CDA agents have three digits on each hand. Waternoose and Jerry have seven digits on each hand. Cephalopod (Charlie, Rivera, Tony, the Harryhausen's employees) and armless (Harley and his assistant, Waxford) are fingerless, either because their limbs are tentacles or because they don't have any arms at all.
** Celia has mit-like hands, and only has two thumbs as a result.
* FreezeFrameBonus:
** During the scene where Mike and Celia are looking at him on the magazine cover, there is a poster in the background labeled "The 10 Rules of Comedy". It is a little hard to make out, but the rules are:
--->1. Punchline doesn’t mean hit the kid.\\
2. Don't howl at your own jokes.\\
3. Tentacles funny. Really sharp claws not funny.\\
4. Multiple heads should speak one at a time.\\
5. No claws for tickling.\\
6. Scared kids don’t laugh.\\
7. Try not to hurt the audience.\\
8. Always keep sharp spikes in.\\
9. You don’t get a laugh if you don’t take a bath.\\
10. Never let them see you slobber.
** In the scene where a monster runs out of a child's room when she isn't scared of him, we can briefly see a poster inside the child's room. This poster was also seen in [[WesternAnimation/ToyStory1 Hannah's Room.]] And since the monster made it clear that it had been a girl's room...
* FullNameUltimatum: An angry Celia makes her presence known to Mike by shouting, "Michael Wazowski!" It stops him dead in his tracks and gives him an OhCrap moment.
* FunnyBackgroundEvent: When the local news is interviewing one of the witnesses from Harryhausen's talking about the child using its "mind powers" on him, a monster holding a baby can be seen behind him nonchalantly waving to the camera, and then moving their baby's hand to make it wave.
* FunWithFlushing: Sulley gets some of Boo's toys tangled up on him when he re-enters the monster world. He tries to get rid of them by flushing them down the toilet, but it gets clogged up and overflows. He then has to dump them in someone's locker, where they reappear later as a BrickJoke.
* FunnyOctopus: There is an octopus-like sushi chef working in the restaurant named [[InJoke Harryhausen's]]. Like all the patrons, this octopus character is terrified of the human toddler Boo.
* FurnitureBlockade: When Sulley is trying to save Boo from Mr. Waternoose, he runs onto the factory's training room and bends a metal pipe to lock the doors, keeping him at bay long enough to fetch Boo's door and return her to the human world.
[[/folder]]

[[folder:Tropes G-H]]
* GambitRoulette: Sulley and Mike's plan to get Waternoose to confess depended greatly on random chance, for instance the fact that the agents wouldn't follow Sulley after he pushed over the cans. But this is justified since they had less than a minute to come up with it.
* GenreBusting: It is a monster movie / kid flick / invasion movie / sci-fi / family drama / comedy.
* GilliganCut
-->'''Mike:''' What do you wanna do, walk out in public with that ''thing?'' And then I suppose we'll just waltz right up to the factory!\\
(''Sulley looks thoughtful; cut to outside the factory'')\\
'''Mike:''' [[YouJustHadToSayIt I can't believe we are waltzing right up to the factory!]]
* GlassSmackAndSlide: The "bloopers" shows one of the CDA members missing his entrance by FastRoping, the window pane not pivoting, and smacking flat against it before sliding down.
* GorgeousGorgon: Mike certainly thinks this way about Celia.
* GroinAttack: Sulley and Mike are trying to get Boo to laugh again to reactivate all the closet doors. Mike tries a trick where he lands on a metal bar right between his legs and is in notable pain. Even though you can't ''see'' anything, '''ouch'''.
* HandshakeRefusal: Before the scarers start working on the first day, Sulley turns to Randall at the next station, holds out his hand and says, "Hey, may the best monster win," expecting a handshake. Randall refuses to give one and simply says, "[[{{Narcissist}} I plan to]]."
* HaveYouToldAnyoneElse: Unlike most examples, it seems genuinely innocuous (since the one asking it is concerned about the company's welfare and, by extension, its public relations) until TheReveal.
* HeelRealization: After inadvertently scaring Boo, Sulley realizes how wrong scaring children is.
* HelpingAnotherSaveFace: Mike is about to go on his romantic dinner date with Celia when he realizes he forgot to file his paperwork. He's about to explain to Celia why he can't take her to dinner when Sulley says that Mike was reminding him to get his paperwork. Along with saving Mike's date, this also leads to Sulley meeting Boo, which starts up the plot.
* HelplessWindowDeath: Sulley can only watch in growing horror as the garbage pulverizer reduces Boo to a compact block. Subverted when it's revealed that only a piece of Boo's disguise went through the machine; Boo herself is alive and intact, much to Sulley's relief.
* HeterosexualLifePartners: They even have a song about it!
* HilariousOuttakes: Continuing the tradition with their last two films, fake bloopers were added a few weeks after the film's opening during the closing credits and later included on the home video releases. This was the last Pixar film to do this, as the creators felt that it was getting old (not to mention, it wouldn't be as convincing [[WesternAnimation/FindingNemo underwater]]). The Creator/DisneyPlus release doesn't include them, not even under the Extras tab.
* HopeSpot:
** A minor one for Randall at the beginning. At one point he seemingly manages to edge out Sulley's scare numbers and take the top spot...for about five seconds, until Sulley takes it right back thanks to a convenient slumber party.
** Near the end of the film, Sulley and Mike have defeated Randall and managed to find their way to Boo's door. Unfortunately the power surge caused by Boo enabling them to use the doors has expired, so now they have to open it again, and are unable to before Waternoose summons the door to apprehend them.
* HumansAreCthulhu: Monsters are led to believe that human children are incredibly toxic and dangerous. When Boo is seen by a crowd of monsters, the entire building breaks out into hysteria as the monsters panic.
[[/folder]]

[[folder:Tropes I-L]]
* IdealHero: How Mike views himself. Actually, it is Sulley, even though Mike is responsible for manning Sulley's day-to-day matters. See also TheLancer and {{Sidekick}}, both below.
* IDidWhatIHadToDo: Waternoose's justification for his involvement. He and Randall are working behind the scenes to solve the major energy crisis caused by kids' desensitization by kidnapping children and subjecting them to the Scream Extractor.
* IHaveJustOneThingToSay: ''*Mike pulls a sock out of his mouth and throws it*'' Catch!
* IKnowWhatWeCanDoCut: Combined with EurekaMoment at the end of the film. After Mike's comment "at least we had a few laughs", Sulley has his brainwave, and then the film cuts to the monsters using laughter as an alternative power source to screams.
* INeedToGoIronMyDog: The Yeti's excuse:
-->'''Yeti:''' Oh, would you look at that? We're out of snow cones.
** Subverted in that he really ''was'' going to make more snow cones, possibly to cheer the monsters up.
* InkSuitActor: Despite the fact that the cast is full of inhuman monsters, they still manage to resemble their voice actors. According to the DVDCommentary, Steve Buscemi accused the casting director of typecasting him when he first saw a sketch of Randall.
* {{Invisibility}}: Randall, being based on a chameleon and all.
* IronicEcho:
** When Mike parodies the training instructor from the start of the movie:
--->'''Mike:''' Well, I don't know about the rest of you guys, but I spotted ''several'' big mistakes.
** Both Sulley and Mike say "that's not her door" at different points in the movie. Sulley when Mike brings up a door that isn't Boo's, and Mike when Waternoose brings up an ominous metal door.
--->'''Sulley:''' Mike, that's not her door.\\
'''Mike:''' Uh, sir? That's not her door...
* {{Irony}}:
** The monsters are as afraid of the children as they are of them, due to the fact they believe their touch is lethal.
** After helping Waternoose exile Sulley and Mike to the Himalayas, Randall gets exiled at the end of the film.
* IsThatCuteKidYours: Waternoose asks Sulley this when he first sees Boo, though Sulley and Mike cover this [[BlatantLies by saying that she is Sulley's "cousin's sister's daughter" and that it is "Bring an Obscure Relative to Work" Day]]. Waternoose seems to go along with the idea. Later, the company's day care worker mistakes Sulley to be Boo's father as well.
* ItIsDehumanizing: Mike refers to Boo as "it" a lot in the first half of the film. He stops by the end.
* JumpingOffTheSlipperySlope: Waternoose did this quite a while ago when [he decides that ''nothing'' would stop him from saving his company.
* JumpRopeBlunders: At one point, some monsters are jumping rope, when one of them gets distracted saying goodbye to Sulley and Mike and thus gets tangled in the rope and [[EyeScream thrown into someone's eye]].
* {{Kaiju}}: Ted, a monster so large [[GentleGiant Sulley]] only comes up to about half his leg. He also clucks like a chicken, [[RuleOfFunny oddly enough]].
* KickTheDog:
** Intentionally performed by Randall on ''way'' too many occasions to count.
** Waternoose wasn't kidding about what he said with the promise to keep his company afloat, due to his kidnapping of Boo. Yes, he would do ''anything'' to keep it afloat -- even if it meant breaking the law.
* KickTheMoralityPet: Unintentionally performed by Sulley toward Boo, leading to a HeelRealization.
* KnightTemplar: Waternoose wants to save his family business and Monstropolis from collapse due to a power shortage. His "solution" drives him into would-be child slaughterer.
* TheLancer: How Mike views Sulley. Actually, Mike is TheLancer for Sulley. See also TheHero, above, and {{Sidekick}}, below.
* LargeHam: The Yeti / Abominable Snowman, who is [[RunningGag played by John Ratzenberger]].
** [[EvilIsHammy Randall]] is the oft-quirky Steve Buscemi in a [[CardCarryingVillain unabashedly mean role]], and he shows business [[IncomingHam right in his first line ("WAZOWSKI!")]].
* LastNameBasis: Sulley is usually referred to as Sulley or Sullivan. Mostly Randall calls him the latter. The only person to really refer to Sulley by his first name, James, is Waternoose. Mike is also referred to by his surname of Wazowski by Roz and Randall.
* LaughOfLove: We get the following exchange between Mike and Celia:
-->'''Mike:''' I just got us into a little place called, um, Harryhausen's.\\
'''Celia:''' ''[gasps]'' Harryhausen's? But it's impossible to get a reservation there!\\
'''Mike:''' ''Not'' for [[AffectionateNickname Googly-bear]].\\
''[Celia giggles]''
* LeaveNoWitnesses: This is how Randall and Waternoose attempt to deal with James, Mike, and Boo. Waternoose says "There can't be any witnesses" when James and Mike return to Monstropolis after their banishment.
* LetUsNeverSpeakOfThisAgain: After Sulley and Mike help [[ChekhovsGunman CDA Agent #1]] uncover Waternoose's conspiracy and return Boo home, she tells them "None of this ever happened, gentlemen. And I ''don't'' want to see any paperwork on this."
* TheLonelyDoor: The closet doors allow the monsters to access the human world via children's bedrooms.
* LovecraftLite: The proliferation of scales and tentacles and the inter-dimensional aspects. In addition, the trope is played with, in that the monsters regard the human world as a dangerous place and treat Boo like a pint-sized EldritchAbomination. This also counts as FridgeBrilliance; the monsters, many of which count as Eldritch Abominations, in turn consider ''us'' the real monsters.
[[/folder]]

[[folder:Tropes M-N]]
* MamaBear: Armed with nothing but a shovel, a mother in a trailer park defends her son by assaulting a monster who she thinks is an intruding gator.
* MammalMonstersAreMoreHeroic:
** Of the two top scarers at the company, Sulley, a big furry blue monster, is portrayed in a more heroic light than Randall, a scaly salamander-type monster. Sulley is a typical, hardworking company monster while Randall is revealed to be using underhanded means to get ahead. This is reinforced by Boo's reaction to each, calling Sulley "Kitty" while being terrified of Randall. The fact that they have both scared innocent children remains, {{downplay|ed}}ing the trope a bit. However, Sulley sees it as just his job and has a sincere HeelRealisation later on, whilst Randall seems to enjoy it more than he really should.
** This is also played straight with BigBad Waternoose being a spider-like creature willing to keep Boo from getting home to stop the company from shutting down. In contrast to Sulley, who is willing to risk his job and life to protect her.
** {{Zigzagged}} as other monsters like Mike and Celia are less mammalian than Sulley but are still seen as sympathetic, with Boo playing with and laughing at Mike multiple times.
* MatchCut: When Mike sarcastically tells Sulley that they'll waltz right up to the factory, the camera zooms into an armchair. It cuts to a close up of Boo's monster disguise, with the same texture of the armchair.
* MeanCharacterNiceActor: Roz and Randall enjoy good-natured jokes as the bloopers indicate.
* MeaningfulEcho: Albeit with an inversion.
-->'''Roz:''' And I ''don't'' want to see any paperwork on this.
* TheMenInBlack: The CDA. Extra points for being a complete inversion of the TropeNamer -- they're protecting unsuspecting ''monsters'' from hideous ''humans''.
* MinorCrimeRevealsMajorPlot: Sulley happens to stumble upon Randall apparently cheating the system by having a door at his station after hours, only to discover a much larger child-kidnapping conspiracy out of it that went all the way up to not only Randall, but also to Mr. Waternoose himself.
* MissedHimByThatMuch:
** Sulley, Mike, and Boo are hiding in a bathroom stall from Randall. Randall punches them open one by one, and Sulley flinches as every door opens. Before Randall can burst the stall the trio are hiding in however, his assistant Fungus points that Boo is on the front page. After a short discussion, Randall punches the door Sulley, Mike, and Boo are hiding in, but isn't looking at the time, and the door closes before he can spot them. Then he yells at Fungus and chases him out of the bathroom, demanding him to get to work on his plan.
--->'''Randall:''' You just keep the machine up and running, I'll take care of the kid. And when I find whoever let that kid out... THEY'RE DEAD! ''(punches open the stall the trio is hiding in, but he isn't looking in their direction; the door closes again before he can notice them)'' WHY ARE YOU STILL HERE?! COME ON! GO! MOVE! NOW!\\
'''Fungus:''' ''(as Randall chases him out of the bathroom)'' No, I'm not here! I'm going right now!...\\
'''Sulley:''' ''[-They're gone.-]''\\
(''A huge splash is seen in the stall Sulley, Mike, and Boo are hiding in'')\\
'''Boo:''' Ew.
** Later, Sulley hides underneath a table on the Scare Floor, and Randall materializes right beside him, but is looking the other way so Randall can't see him, and the bell rings before Randall can notice him.
* MistakenForGay: Sulley and Mike several times, but it is kept rather subtle.
* TheMole:
** Both Randall and Waternoose. Before TheReveal showing how grossly vile Mr. Waternoose became, the former is only depicted as cocky and mean, thus less surprising than the latter Mole.
** [[ChekhovsGunman Roz]] is working for the CDA as #1.
* MonsterCloset: Technically, the closets aren't hidden, but it is impossible to tell from the outside when one of them's gonna open and reveal a monster.
* MonsterFacade: Doing this is the job of all the Scarers: they need to pretend to be vicious and scary because the screams of terrified children are their main source of energy.
* MoodWhiplash: When Sulley is fighting Randall, it is funny since Randall is invisible. But when Randall starts to [[NightmareFuel strangle]] Sulley, the mood gets a bit serious.
* MotiveMisidentification: Mike thinks Randall's behavior and motivation is all about breaking the scare record up until he flat out tells him it is not.
* MotiveRant: Waternoose provides this during his AccidentalPublicConfession in front of the CDA in the simulation room.
* MultiArmedAndDangerous: Randall (four arms and legs), the four-armed and six-armed CDA agents, and Rivera (six tentacle arms and five legs).
* MultiArmedMultitasking: The sushi chef.
* MultipleHeadCase:
** Very briefly seen, after Sulley and Mike expose [[BigBadDuumvirate Randall and Mr. Waternoose]]'s plan to [[TheMenInBlack the CDA]]. A two-headed monster can be seen, the two heads exchanging glances with each other.
** Also, Roz is seen reading a newspaper headlined, ''"Baby born with 5 heads, parents thrilled."''
* MyGodWhatHaveIDone: Sulley is ''deeply'' shaken when he sees the effect that his scaring demonstration has on Boo, and by extension the effect his scaring has on human children in general.
-->'''Sulley:''' Did you see the way she ''looked'' at me?
* MysteriousMiddleInitial: It is not revealed what Sulley's middle initial of P stands for.
* NecessarilyEvil: Despite being the BigBad of the movie, Waternoose makes it clear that he wished he didn't have to resort to such measures, but felt that he had no choice and that his child-kidnapping conspiracy is this. Everyone else disagrees.
* NestedMouths: In Harryhausen's, one of the monsters has a second monster for a tongue, which eats the food.
* NeverFilledOutOfficialPaperwork: A variation. Mike Wazowski frequently forgets to file his paperwork, and after news that a child got loose from the Monster's Inc. scream processing facility, Mike goes to Roz, who's in charge of the doors going into children's rooms, to find the door Randall was working in, to put Boo, the child in question, back. Roz informs Mike he didn't file his scare reports again, ignores his request, and closes the window to her office on him. Specifically, Mike didn't file the paperwork because he was late for a date with Celia and Sulley offered to file it for him, but then Sulley got scared by Boo and forgot about the paperwork.
* TheNewRockAndRoll: {{Downplayed}}. It is implied that the increasing explicitness of human media is making kids harder to scare and contributing to the energy shortage in the monster world; however this remains as merely an undertone and the film never gets preachy or {{Anvilicious}} about it.
* NiceJobBreakingItHero:
** Sulley throws a teddy bear that looks like Mike at Boo so that she would quiet down and stop laughing and running around, but then Mike angrily snatches it away from her asserting it is his. Guess how Boo reacts.
** Sulley attempts to tell Waternoose of what Randall tried to do, but it turns out they've been conspiring together and sends him and Mike to the Himalayas. [[WhatTheHellHero Mike calls him out on that]].
** Just barely subverted in the ending: Though Sulley and Mike ultimately manage to get Boo back into her bedroom, and expose Waternoose of his crimes, their actions also caused the company to nearly be shut down and almost caused a permanent city-wide blackout as a consequence. The only reason it did not turn out that way was because it was discovered that the children's laughter had 10x the power output of scream. In addition, the Scarers seem well-adjusted to the Laughter switch.
* NoHoldsBarredBeatdown: Randall delivers one to Sulley while invisible so Sulley can't fight back. Mike doesn't realize Sulley's being beaten up because he can't see Randall.
* NonMammalianHair:
** Roz (a.k.a. CDA Agent #1)is a large slug-like monster with a tuft of white hair on her head.
** Also, some of the monsters, whether resembling toads, slugs or octopodes, will inevitably have some form of hair on their heads.
* NoPeekingRequest: At the end of the film, Mike does this with Sulley when he's about to surprise him with Boo's reconstructed door.
* NotAfraidOfYouAnymore: Boo to Randall, right after beating the crud out of him to save Sulley.
* NotSoInnocentWhistle: After George forcibly stops his assistant from calling yet another 2319, George walks away whistling smugly.
[[/folder]]

[[folder:Tropes O-P]]
%% Administrivia/ZeroContextExample entries are not allowed on wiki pages. All such entries have been commented out. Add context to the entries before uncommenting them.* OddCouple: Sulley and Mike. See also OppositesAttract, below.
%% Administrivia/ZeroContextExample entries are not allowed on wiki pages. All such entries have been commented out. Add context to the entries before uncommenting them.* OffscreenTeleportation: Boo does it several times.
* OhCrap:
** Mike during the line from Roz. "And I'm ''sure'' you filed your paperwork correctly. ''For once.'' ''[beat, Mike's eye widens]'' Your stunned silence is ''[[SarcasmMode very]]'' reassuring."
** Sulley when he tries to return Boo to her room, only for the door handle to turn - revealing someone's already inside - before he can open it.
** Sulley and Mike as they escape Harryhausen's only for them to realize that the CDA has used the 835 to decontaminate the restaurant.
** Sulley and Mike entering the factory with Boo, only to find the lobby swarming with CDA agents. Another one follows moments later when they see Boo heading towards Waternoose.
** Mike upon hearing Celia's furious voice [[FullNameUltimatum shouting his name]] and seeing her stride towards him with [[ConeOfShame cones]] around her neck, as well as those on her snakes.
** Sulley when he sees Needleman and Smitty dump the trash (that Sulley thinks has Boo in it) down a chute that leads to the trash compactor.
** Sulley and Mike get one after Waternoose's WhamLine, as they realize they're about to be banished.
** Also Randall, after Sulley and Boo turn the tables on him and Sulley makes it very clear he is about to get his comeuppance.
** Also Waternoose, when he tries to snatch Boo from her bed, [[EngineeredPublicConfession only to discover he has snatched the simulated child in the simulation room, and the CDA has recorded every word he has said.]]
* OhNoNotAgain: When Randall gets trapped in the human world he is mistaken for an alligator. The humans' dialogue implies that he is not the first "gator" to appear in the home.
-->'''Boy:''' Mama! Another gator got in the house.\\
'''Mama:''' ''Another'' gator?! Gimme dat shovel!
* OppositesAttract: Sulley and Mike.
* OurMonstersAreWeird: The monster world's denizens come in all shapes, sizes, and colors, but there is some general consistency. All of them are brightly colored and cartoonishly designed. They also tend to generally resemble members of families in the animal kingdom, such as mammals (Sulley, George, the Abominable Snowman), anthropods (Waternoose), reptiles (Randall and Ms. Flint), cephalopods (Charlie and a bunch of background monsters), and gastropods (Roz, Smitty, and a bunch of background monsters). Even then, there are some exceptions: Mike and Fungus are more alienlike, whereas Celia, Needleman, and Jerry are more humanoid.
** There is even a monster who has removable eyes!
* OverreactingAirportSecurity: The CDA's response to a 2319 alarm leaves George humiliated.
* PackedHero: Parodied. Boo loses one of the "eyestalks" of her monster costume in a trash can. Sulley sees it and thinks she is in a pile of garbage, then watches the garbage get swept into a cart, dropped down a chute, and put through an exceedingly brutal compactor. The audience sees her walk away from the garbage can; Sulley faints at every step of the compactor.
* PapaWolf: Sulley to Boo.
* PaperThinDisguise: Boo's monster outfit, to an extent, considering her head is looking out through the mouth.
* PeekABogeyman: Sulley, upon noticing Boo make a drawing of Randall, assures her that Randall isn't coming through the closet by opening the closet door to reveal nothing in there. In the outtakes, Roz is shown to be there, and she says "Guess who?"
* PigLatin: "Ook-lay in the ag-bay." {{Lampshade|Hanging}}d in the HilariousOuttakes:
-->'''Sulley:''' Look-lay in the bag-bay.\\
'''Mike:''' I think you mean, "Ook-lay in the ag-bay."\\
'''Sulley:''' What? Didn't I, uh...?\\
'''Mike:''' Well, you know, maybe you should just take a minute and ead-ray your ipt-scray!
* PlotMandatedFriendshipFailure: After being banished to the Himalayas, Mike finally lets Sulley have it for dragging him into the entire Boo debacle and essentially ruining his life, causing a fight that would have turned violent had the Abominable Snowman not found them. When Sulley leaves to rescue Boo, Mike refuses to join him, though [[ChangedMyMindKid he comes around]] a few minutes later.
* PluckyComicRelief: Mike, and Boo to a lesser extent.
* PortalDoor: Probably one of the more iconic examples in fiction. The titular factory has a massive warehouse full of doors which become these when powered, allowing monsters to go into kids' rooms to scare them to collect scream. When the doors are not on power, those in the monster world open to nothing on the other end, and the closets in the human world open as normal, especially when said doors in the monster world have been destroyed.
* PottyDance: Boo does it at one point in the movie. At first, Sulley and Mike think she was dancing with joy, but Sulley quickly realized its true meaning.
* PoweredByAForsakenChild: [[BigBad Waternoose]] and Randall's plan to solve the power shortage. Since it's getting harder and harder to scare kids in the usual way, Randall constructs a "scream extractor" that will suck the very screams from a child's lungs--meaning that they'll be ''kidnapping children'' to get fuel.
* PreAsskickingOneLiner: A furious Mike to Sulley after they are banished: "YOU'RE STILL NOT LISTENING?!" Immediately after, he screams with rage and dives at Sulley.
* ProductionForeshadowing: [[WesternAnimation/FindingNemo Nemo]] appears as a clown fish on the wall in Harryhausen's, is seen on the wall in the trailer Randall gets banished to, and a Nemo toy is seen among the toys in Boo's room.
* ProperlyParanoid: When Sulley and Mike run to find Boo's door waiting for them on the Scare Floor, and Sulley finds out Randall put it there, he becomes immediately cautious, and Boo [[ImminentDangerClue is suddenly terrified and hides under a desk]]. He says that something feels wrong about all this and refuses to let Boo through the door. Mike goes inside to assure him it is perfectly safe... and then gets stuffed into a box by Randall, who was waiting inside to trap Boo.
* ProsceniumReveal: The film opens with a monster walking into a child's bedroom. He is freaked out when the child starts screaming and starts knocking things over -- and then suddenly the lights turn on, an alarm goes off, and the voice "Simulation Terminated!" is heard repeatedly. One wall of the room lifts up, revealing that the child is actually a robot, and we are actually in Monsters, Inc.'s state-of-the-art children's room training simulator, being observed by an instructor and several other students, who start critiquing him about his mistakes.
* PunchClockVillain:
** It turns out that monsters scare children because screams are their source of electricity. Off-duty, they're pretty nice people.
--->'''Sulley:''' (''to Boo'') I'm not going to scare you. I'm off duty!
** Also, Fungus is this as Randall's partner
--->'''Fungus:''' I'm sorry, Wazowski, but Randall said I'm not allowed to fraternize with victims of his evil plot.
* PunctuatedForEmphasis: Randall is especially guilty, and also, to a lesser degree, Mike.
* PyrrhicVictory: Sulley and Mike manage to foil Waternoose's extreme plan to save Monsters, Inc., by enslaving children, and get him arrested for it, but as he is taken away, Waternoose warns that their actions means that Monsters, Inc., will be shut down and doom all of Monstropolis to a state of perpetual blackout. Fortunately, Sulley manages to subvert it by taking control of the company and switching over to collecting laughter instead of scream, solving Monstropolis's energy crisis.
[[/folder]]

[[folder:Tropes Q-R]]
* RageBreakingPoint: After Sulley and Mike are banished, Mike tells Sulley that all he had to do was listen to him about what he thought was going on. Then he realizes that he wasn't listening to him, and still isn't, crosses this, screams with rage and dives at Sulley, knocking the two of them down a snowdrift, and leaving both poised to punch at the other before Mike sees the Abominable Snowman behind Sulley.
* RapidFireNo: Sulley lets one off after Waternoose kidnaps Boo and banishes him and Mike to the Himalayas.
* RealFakeDoor: Any time a door opens to nothing, especially when Sulley and Mike are exiled to the Himalayas. Moreover, the closets in the human world open as normal.
* RedemptionRejection: During the final confrontation, Sulley attempts to reason with Waternoose and talk him out of his plans to kidnap children. Waternoose refuses, first by backhanding Sulley across the room, then by attempting to attack Boo.
* RefugeInAudacity: Mike pulls this twice with BlatantLies both of which surprisingly work.
** He first tells Waternoose that a disguised Boo is present at work due to it being "Bring An Obscure Relative To Work" Day. Justified due to having to think on the fly. It works, as Waternoose is so busy with the energy crisis that he assumes he missed the memo.
** He does it again on the Scare Floor when everyone turns to look at him and Sulley, telling them they're rehearsing a scene for the upcoming company play. That also works. Bonus points when, in the outtakes, the play actually gets made.
* ReminderFailure:
** Mike has Post-it notes inside his locker, reminding him to file his paperwork. He ''still'' keeps forgetting to file it.
** A {{subverted|Trope}} example occurs when Sulley tries repeating to himself where he should deliver Mike's paperwork. He corrects his own [[RepeatedRehearsalFailure verbalized mistake]] on which colored copies go where, but he never actually gets around to delivering them, forgetting because the human child Boo gets out.
* RepeatCut: When the door on which Sulley, Mike, and Boo are riding hurtles down a steep slope. In the first shot, you see them travelling down most of slope from behind, then you see a shot of them from the front, followed by a POV shot. But judging by the first shot, it takes them a rather long time to go down the last part of the slope, meaning that the camera must have jumped back a second in time.
* RepeatedRehearsalFailure: Sulley tries repeating to himself where he should deliver Mike's paperwork. He messes up, then subverts the trope by correcting his mistake.
-->'''Mike:''' The pink copies go to accounting, the fuchsia ones go to purchasing, the goldenrod ones go to Roz. Leave the puce.\\
''[One SmashCut later]''\\
'''Sulley:''' Pink copies go to accounting, fuchsia ones go to Roz. ''[{{Beat}}]'' [[SubvertedTrope No]], the fuchsia ones go to ''purchasing'', the ''goldenrod'' ones go to Roz. Man, I have no idea what puce is. ''[He looks at the colors]'' Oh, ''that's'' puce.
* ReptilesAreAbhorrent: While there are many other reptilian / dinosaurian monsters that aren't villainous in the slightest, Randall is the most obviously reptilian-looking and "serpentine" of them all.
* TheReveal:
** Waternoose isn’t exactly a HonestCorporateExecutive - he is the BigBad.
** CDA agent #1 is Roz.
* RewatchBonus: The scene where Sulley accidentally scares Boo has Mike in the background trying to convince Mr. Waternoose that Boo isn't toxic. Waternoose's reactions during that scene include a cartoonish gasp and pantomime raising of hands when he first sees her, a calculating shiftiness of his eyes once Mike starts talking, being so willing to discard a lifetime of teaching during the course of a minute-long speech from Mike that he willingly picks Boo up (which Mike is still hesitant to do after a full day in her company), a different sort of anger during his "how could this happen?" question than would be expected from someone who's just been told a murderous psychopath is using his factory to kidnap children, and asking who else knows about Boo. Assuming the viewer wasn't distracted by the heartbreaking way Boo cowers away from Sulley, it would be implausible for even the most ReasonableAuthorityFigure to react as calmly as Waternoose does. Rewatching the scene after discovering that he is behind the whole scheme makes all the subtleties of his reaction make perfect sense.
** When the CDA first comes bursting into the factory, there's a seemingly-random shot of Roz slamming down the window of her cubicle as they rush by her. This makes a lot more sense when you discover that she's TheMole for the group on an undercover investigation--presumably, she wanted to ensure that no one would look at or talk to her during their raid so her cover would remain intact.
* RunningGag:
** Mike repeatedly failing to file his paperwork.
** Mike is always being cut somehow from images and videos he appears in (in the [[https://www.youtube.com/watch?v=Cjq-9sdcY0U Monsters, Inc. commercial]] at the beginning, the M in the "Monsters Inc." corporate logo is hiding him) -- and ''doesn't care'' because he did at least get a bit of the spotlight.
** It is more implied that he got slipped the [[IdiotBall idiot pill]] and didn't notice.
--->'''Mike:''' I can't believe it! I'm... ''on the cover of a magazine!''
** The original DVD has a picture of Sulley and Mike -- with Mike largely obscured by the hole.
** "23-19! We have a 23-19!" Poor [[TheChewToy George]]. He finally wises up enough to pass off the sock to his assistant before he can make a [[TheMenInBlack 2319 call]].
** [[HilariousOuttakes Roz is quite the practical joker.]]
--->'''Roz:''' Guess who?
[[/folder]]

[[folder:Tropes S-T]]
* SarcasticWellWishing: When [[TheManBehindTheMan Waternoose]]'s [[WellIntentionedExtremist plan to save the company (and thus all of Monstropolis) by enslaving children for their screams]] is exposed for all to see, he is arrested for his attempted crime, [[VillainousBreakdown but not without]] [[WhatTheHellHero telling Sulley off]]:
-->'''Waternoose:''' I hope you're happy, Sullivan. You've destroyed this company! Monsters Incorporated is dead! Where will everyone get their scream now?! The energy crisis will only get worse -- ''because of YOU!!''
* SayMyName: Sulley yells "BOO!" after he and Mike are banished to the Himalayas when he opens the banishment door and sees only snow behind it.
* SceneryPorn:
** The closet door storage chamber is this in a "Holy sh**, this is great!" way.
** All of the doors Sulley and Mike run through during the Randall chase scene. Because the filmmakers just ''[[SarcasmMode happened]]'' to need backgrounds of Hawaii, Japan and Paris, right?
* ScoobyDoobyDoors: The final Randall chase is a stunning example. Contrary to most uses of the trope though, this is entirely justified in-universe because of the nature of the doors.
* ScoobyStack: [[https://static.wikia.nocookie.net/pixar/images/2/22/Monsters_inc_ver4.jpg/revision/latest?cb=20110515133310 This Japanese poster]] and the 2009/3D Blu-ray cover show Sulley, Randall, Roz, Celia, and Mike poking their heads through Boo's door. The 2002 VHS and DVD covers have a {{downplayed|Trope}} version with just Sulley and Mike.
* ScrewTheRulesIHaveConnections: A lighthearted example. When Mike tells Celia that he is taking her to Harryhausen's, a super-trendy sushi restaurant, for her birthday, she says that "it's impossible to get a reservation there." It is later revealed that Sulley used his pull as the city's top scarer to book Mike a table.
* SearchingTheStalls: Sulley and Boo hide from Randall in a toilet stall. He punches the stalls open one by one, and Sulley flinches as every door opens. Randall actually slams open the stall Sulley is hiding in, but isn't looking at the time. Momentum closes the door before Randall sees them.
* SecondPlaceIsForLosers: Randall certainly seems to think so and is second-place scarer to Sulley for a while.
* ShackleSeatTrap: Randall uses a contraption called a "scream extractor" which has automatic wrist straps that hold a victim in the seat while a plunger-looking device attaches itself to their face to suction and capture sound as they scream.
* ShooOutTheClowns:
** A brief moment of this happens after Sulley and Mike are banished. During a tense moment for Sulley and Mike during their argument, the Abominable Snowman awkwardly excuses himself to leave the cave and make more snow cones, as Mike had just thrown them all at Sulley in his anger.
** Mike is absent when Randall is about to knock Sulley to his death during the door chase and only returns after Boo saves Sulley by delivering a NoHoldsBarredBeatdown.
* ShortScreentimeForReality: Monstropolis is a massive, sprawling city populated with monsters, while the most we see of our world consists of several children's bedrooms, a single beach, and a snowy mountain.
* ShoutOut: See [[ShoutOut/MonstersInc here]].
* ShovelStrike: Randall's fate. He is banished to a trailer in the bayou where a RaginCajun repeatedly whacks him with a shovel, mistaking him for a gator.
* ShutUpAndSaveMe: Sulley is being wailed on by Randall, who is invisible at the time. Mike shows up, can't see him, and doesn't even notice that Sulley is in danger while he tries to apologize for refusing to help him save Boo. [[AccidentalHero Sulley is saved when Mike unintentionally unveils Randall's position while getting upset at Sulley for "ignoring" him.]]
-->'''Mike:''' Hey look, it's Randall. It's... ''ohhhhh''.
* SickeninglySweethearts: Mike and Celia.
-->'''Mike:''' Schmoopsy-poo!\\
'''Celia:''' Googly-bear!
* {{Sidekick}}: Mike views Sulley as his {{sidekick}}, but everyone else can see that Mike is obviously Sulley's.
* SinisterSuffocation: Randall intends to kidnap countless human children across the globe and subject them to a machine that forces them to scream uncontrollably, leading to death by suffocation. Mike is clearly terrified when Randall tries to use him as a test subject, while Sulley goes on a RoaringRampageOfRevenge when the villain attempts to use the device on a human girl he had befriended.
* SlippingIntoStink: While hiding in a bathroom stall and standing on a toilet, Mike Wazowski's foot accidentally dips into the water, causing him to pull it out. However, he cannot hold his balance for long, and eventually slips and falls completely into the toilet with a huge splash.
* SmugSnake: Randall.
* SneezeOfDoom: PlayedForLaughs during Sulley and Mike's commute to work -- a monster reading a newspaper sneezes fire on it, destroying it before he could finish reading. He grumbles "Aw, nuts!"
* SpannerInTheWorks:
** Mike manages to get the ball rolling on uncovering Waternoose's conspiracy by ''forgetting his paperwork''. Because he forgot and had a date that night, he sent Sulley in his place, meaning that Sulley was in the right place to discover Boo's door, which leads to her entering Monstropolis.
** Roz/CDA Agent 1 comments that her two and a half years of working undercover almost went belly up when Sulley got to Boo before Randall. She then admits that without Sulley and Mike's help, she never would've learned Waternoose was the head of the conspiracy.
* SpecialPersonNormalName: Everyone who works for Monsters, Inc. has a plain name like "James P. Sullivan" or "Mike Wazowski", which helps to reinforce their characterization as average, working-class Joes.
* TheStarscream: After Waternoose tells Randall to leave no witnesses, Randall replies in a manner that lets the audience know that he is planning to backstab his own boss when this is all over.
* StatingTheSimpleSolution: When Mike is trying to come up with a plan to get rid of Boo, from using a giant slingshot to digging a tunnel (with spoons) and releasing her into the wild, Sulley offers up the idea of putting her back in her door so it would be like none of it ever happened and everything would be back to normal. While a smart idea, it turns out to be anything but simple.
* StealthPun:
** When Celia's Medusa-like hair keeps kissing Mike, she says, "Michael, you're such a charmer." A snake charmer.
** Near the beginning, we see a gigantic scaly monster crossing the road. He makes the sounds of a chicken.
** The company's name is Monsters, Inc., but is sometimes referred to by its initials, "M.I." Their logo is an M with an eye on it.
* StumbledIntoThePlot: Sullivan happened to run into Randall doing some "after-hours screaming" during break and kicked off most of the rest of the movie.
* StylisticSuck: Yes, Mike actually ''did'' make "Put that Thing Back Where it Came From or So Help Me" into [[HilariousOuttakes a musical]], complete with mediocre acting/choreography, clumsily-set up backgrounds, and [[ArsonMurderAndJaywalking the CDA as ushers]]. The audience loved it; the critics (of the Monster World) did not. [[FridgeBrilliance It was probably made in a hurry by the CDA to back Sulley and Mike's alibis as part of their cover-up]].
* SuddenlyShouting:
** Mike. At least three times.
--->'''Mike:''' ...lie in bed, sleep in, or simply, ''WORK OUT THAT FLAB THAT'S HANGING OVER THE BED! GET UP, SULLEY!''\\\
'''Mike:''' Well, then why don't you find someplace for it to sleep...''WHILE I THINK OF A PLAN!''\\\
'''Mike:''' I always wanted a pet ''THAT COULD KILL ME!''\\\
'''Mike:''' Once you name it, you start getting attached to it! ''NOW PUT THAT THING BACK WHERE IT CAME FROM, OR SO HELP ME...!''
** Randall also frequently does this.
--->'''Randall''' (''to Fungus''): If I don't see a new door in my station in 5 seconds, I will personally put you '''''THROUGH THE SHREDDER!!!'''''
%%* SuperStrength: Sulley.
* SureLetsGoWithThat: A subtle example but when Randall corners Mike and is accused of cheating he initially acts outraged before suddenly [[VerbalBackspace calming down and no longer protesting the point]] before offering to help get Boo back to the human world. As we later see, it is meant to be foreshadowing that the real reason he was after Boo was in order to use her to test the Scream Extractor.
* SurprisinglyCreepyMoment: The scene where Randall angrily searches the toilet cubicles for the source of a noise he heard is quite intense, considering he nearly caught the tritagonists.
* SurprisinglyHappyEnding: The movie seems like it is about to have a BittersweetEnding in the form of Sulley having to part ways with Boo, but it turns out that Mike Wazowski recreated the door that leads to her room, so Sulley can at least still visit her.
* SurprisinglyRealisticOutcome: Waternoose may be a BenevolentBoss, and Monsters, Inc. may be his family's company, but he's still beholden to his shareholders. [=CEOs=] aren't inherently all-powerful, and the factory doing badly means ''his'' head is on the chopping block. It's most notable when Sulley tries to lift Waternoose's spirits with a pep talk, only for the boss to mutter "Tell that to the board of directors"--they're the ones who have power in a corporation, not just the chief.
* TaeKwonDoor: Mike slams a door on Randall during their fight to the tune of "I hope that hurt, lizard boy!".
* TakeAThirdOption: Sulley, upon gaining control of the company, had only two options of what do to with it. He could have made the workers continue scaring kids for energy, or left the company to fall, causing Monstropolis to lose all power. He takes a third option that he discovered upon first finding Boo (reminded by the last word of Mike's pep-talk): He opts to make children laugh instead, which produces more power than screams of terror did.
%%* TakeMyHand: Sulley to Mike.
* TakeYourChildToWorkDayPlot: [[ExploitedTrope Exploited]] when Sulley and Mike try to return Boo to the human world by disguising her as a monster and sneaking her into the company headquarters. When Waternoose wonders who the cute kid is, Sulley says she is actually his "cousin's sister's daughter", and then claims today is Bring An Obscure Relative To Work Day.
* TeamPowerWalk:
** The scarers dramatically enter the power company floor while slowly walking towards the screen in v-formation. A ShoutOut to ''Film/TheRightStuff''.
** {{Parodied|Trope}} in the HilariousOuttakes segment where Sulley (in front) trips, and the monsters behind him trip, [[DisasterDominoes and the monsters behind them...]] If you look closely, you can actually see a tentacle from the monster behind him getting caught up around his feet which is why he trips.
* TemptingFate:
** After Boo sends everyone at Harryhausen's into a panic, Mike tells Sulley while they flee, "Well, I don't think ''that'' date could have gone any worse." Cue the CDA initiating an 835 on the restaurant and an OhCrap reaction from Sulley and Mike.
** After Boo knocks over Mike's stack of [=CDs=], he notes that "As long as it doesn't come near us, we're gonna be okay." Boo then sneezes on him, causing Mike to [[EyeScream spray his eye with disinfectant]].
** Sulley to Mike when sneaking Boo into the factory: "Everything's going to be OK." Cue an OhCrap immediately afterwards when they find the lobby swarming with CDA agents.
* TerminallyDependentSociety: Implied throughout the film. A major background problem is that kids are harder to scare these days, which is leading to a scream shortage in monster-world where the energy given from screams powers pretty much everything. This is fixed at the end of the movie where making kids laugh becomes the new source of energy.
* ThatCameOutWrong: At Harryhausen's, Mike's telling Celia what he told someone else when asked who he thought he would spend the rest of his life with. He is about to say "you", when Sullivan stumbles by outside and Mike accidentally finishes the statement with a surprised "Sulley!?".
* TheyKnowTooMuch: Mr. Waternoose states this trope after Sulley asks Mr. Waternoose to let Boo go, due to their knowledge of his conspiracy.
* ThingsThatGoBumpInTheNight: A PerspectiveFlip, showing that said things are actually more scared of ''us''.
* ThisIsGonnaSuck:
** George in the locker room when he opens the door to his locker and the [[BrickJoke toys Sulley shoved in there]] fall on him, seconds before CDA agents pounce on him.
--->'''Charlie:''' 2319! We have a 2319!\\
'''George:''' (''groaning resignedly'') Oh, dear.\\
'''CDA Agents:''' Get him! (''[[DogPileOfDoom they bowl George over]]'')
** At one point, Mike needs Boo to laugh. He whimpers before pulling his eyelid and snapping it like an elastic band against his eyeball.
* ThisIsNoTimeToPanic: Inverted. After the first sighting of Boo, a professorial-looking monster appears on TV, seemingly to calm people down. He then tells the audience, "It is my professional opinion that now is the time to [[SuddenlyShouting PANIC!]]"
* ThoseTwoGuys: Needleman and Smitty, two employees who spend their screen time bumbling around with one another.
* ToiletHumor: The snowcone scene:
-->'''Yeti:''' (''holding up balls of YellowSnow'') Snow cone?\\
'''Mike:''' Yuck.\\
'''Yeti:''' No no no, don't worry. It's lemon.
* ToiletPaperTrail: Mike Wazowski ends up with a piece of toilet paper stuck to his foot after he and Sulley have come out from hiding in the bathroom from Randall. [[NoFlowInCGI That was one of the hardest things for the animation team to render]].
* TorchesAndPitchforks: {{Discussed|Trope}} by Mike when he lists the consequences of everything that happened in the end.
-->'''Mike:''' Not to mention the angry mob that'll come after us when there's no more power...
* TrappedInAnotherWorld: Sulley and Mike get banished to the human world by Waternoose and Randall late in the movie. They later [[HoistByHisOwnPetard inflict this fate]] on Randall by throwing him through a door and shutting it off.
* TrappedTheWrongTarget: Mike is threatened by Randall to return Boo to her room during lunch break. When Sulley hears of this, he refuses to let Boo go back to her room, knowing full well that Randall is planning something, so Mike goes inside the room and starts jumping on Boo's bed to prove that it isn't a trap. As it turns out, it actually was a trap, and Randall ends up capturing Mike instead.
* TravelingAtTheSpeedOfPlot: The Abominable Snowman tells Sulley the village is a three-day hike from where they are on the mountain. Three days of hiking does not become thirty seconds just because you are on a sled, but Sulley and Mike can't arrive too late to save Boo.
[[/folder]]

[[folder:Tropes U-Z]]
* UnstoppableRage: Sulley, Mike, and Boo. Sulley when he releases Boo from the scream extractor, Mike when he and Sulley are banished, and finally Boo in the door vault when she attacks Randall and in doing so saves Sulley.
-->'''Mike:''' YOU'RE STILL NOT LISTENING?! (''screams with rage and dives at Sulley'')
* VerbalBackspace: When Mike accuses Randall of cheating the system to boost his numbers, Randall's reaction almost gives away his deeper intentions, before he corrects himself.
--> '''Randall:''' CHEATING?! I-- ... ''Cheating''. Right.
* VertebrateWithExtraLimbs: Several monsters, but most notably:
** Randall, who has four arms and four legs despite looking like a snake-chameleon hybrid.
** Mr. Waternoose, who has six legs, although his case is more justified considering his design is based on the multi-legged spiders and crabs.
** Celia, who is humanoid and has five legs.
** Smitty, who looks like a slug and has four arms.
** Several CDA agents, who are mostly four-armed if they have extra limbs, but one type of agent has six arms.
** Bile, who has four arms and looks like a [[BuffySpeak humanoid, repitilian, blob...thing.]]
** Charlie, George's assistant, has five legs, but like Waternoose, it is more justified because he looks like a cephalopod.
* VillainousBreakdown:
** Randall flies into a borderline psychosis and tries to murder Sulley because Mr. Waternoose all but tells him he'll never live up to Sulley, no matter what he does or how hard he tries.
** At the film's (second) climax, Waternoose himself throws a fit of temper tantrum, straight out yelling to Sulley that he'll kidnap a thousand children before letting his company die. He was about to throw another one immediately, but he can't do much while the CDA escort him out for his crimes. But the second tantrum does take its toll on Sulley's emotions when Waternoose [[WhatTheHellHero calls him out]] for [[NiceJobBreakingItHero the company's demise and ruining any chances Monstropolis has of recovering from the energy crisis]]. However, Sulley does figure out a way to make the company even better.
* WeNeedADistraction: When Randall chases Sulley and Mike through the scare floor to prevent them from revealing Waternoose's plan, Celia announces on the intercom that Randall just broke Sulley's scare record, prompting the other monsters on the floor to mob him with congratulations, allowing Sulley and Mike to make their escape.
-->'''Celia:''' Go get 'em, Googly-Bear.
* WeWereRehearsingAPlay: While arguing about what to do with Boo, Mike ends up yelling at Sulley in the middle of the Scare Floor gathering the attention of all the workers. Mike covered up the outburst by claiming that they were rehearsing for a play, and then attempt to break into song. In an after credits sequence, it is revealed that they really did turn the excuse into a musical.
* WellIntentionedExtremist: Mr. Waternoose: "I'll kidnap a ''thousand'' children before I let this company die! And I'll silence ''anyone'' who gets in my way!"
* WhamLine:
** Throughout the first half of the film, Mike and Sulley think that Randall is cheating, trying to break the all-time scare record. So when Randall finds out that he kidnapped Mike instead of Boo:
-->'''Randall:''' WAZOWSKI?! Where is she, you little one-eyed creh-tin?! [[note]]He meant "cretin".[[/note]]\\
'''Mike:''' [[WrongInsultOffence Okay, first of all it's "cree-tin".]] If you're gonna threaten me, [[DoWrongRight do it properly]]. Second of all, you're nuts if you think kidnapping ''me'' is gonna help YOU cheat your way to the top!\\
'''Randall:''' ''[EvilLaugh]'' [[WhamLine You still think this is about that stupid scare record?]]\\
'''Mike:''' ''[Faltering]'' Well... I did. Right up until... you chuckled like that. And now I'm thinking I should just get out of here.
** How Waternoose's duplicity is revealed.
-->'''Mike:''' Sir, that's not her door...\\
'''Waternoose:''' I know, I know. (''Cue Randall appearing and opening the door.'') It's ''yours''. (''Cue an OhCrap from Sulley and Mike''.)
* WhatTheHellHero:
** Sulley briefly calls out Mike for making a deal with [[TheRival Randall]], knowing the latter is Boo's assigned scarer and likely wants her for malicious purposes. He turns out to be correct when Mike walks into Boo's room and gets taken by Randall.
--->'''Sulley:''' Mike, what are you thinking? We can't trust Randall. He's after Boo.
** After their exile to the Himalayas, Mike tells Sulley that he should have listened to him instead of reporting the situation regarding Boo to Waternoose.
** A downplayed example occurs at the end of the film. Mr. Waternoose points out that Sulley's efforts to reveal his corruption will not only cause Monsters, Inc. to shut down, but also aggravate the energy crisis. Luckily, Sulley figures out a solution not long after.
* WhyDidItHaveToBeSnakes: Boo is remarkably sanguine about finding herself in a world full of monsters, but she is absolutely terrified of Randall, her scarer. Her [[FreezeFrameBonus file]] indicates she actually is afraid of snakes.
* WrongGenreSavvy: Mike, throughout the movie, as he always thinks he is the star and Sulley is his sidekick. Taken to its logical extreme in the "Company Play" bonus scene.
* WrongInsultOffence:
-->'''Randall:''' Wazowski! Where's the kid, you little one-eyed cretin?\\
'''Mike:''' First of all, it's pronounced cree-tin. If you're going to threaten me, do it properly.
* WroteAGoodFakeStory: While arguing over returning Boo to her world, Mike yells at Sulley, "Put that thing back where it came from or so help me—" before realizing other monsters are listening, and gamely tries to pass it off as them rehearsing a musical. During the end credits, we see the premiere of the new musical ''Put That Thing Back Where It Came From Or So Help Me.''
* WoodChipperOfDoom: A non-lethal version in Monsters, Inc.: child-contaminated doors are fed into a chipper; Sulley is heartbroken when this happens to Boo's door at the end, though it is eventually restored afterwards. Randall, at one point, threatens to feed his assistant Fungus into it out of frustration.
* XDaysSince: The scare factory has a sign counting the days since the last accident.
* YellowSnow: The Abominable Snowman propose some lemon snow cone to Sulley and Mike which are implied to be this trope, Mike even seems disgusted by them and the Abominable Snowman have to insist that it is really lemon.
* YouHaveOutlivedYourUsefulness: In a satirical fashion Sulley tells Randall because Boo isn't afraid of him anymore, his career as a scarer is over.
* YouSayTomato: When Randall first captured Mike and placed him in the Scream Extractor's chair, Randall proceeds to call him a "one-eyed cretin" with a short e. Mike proceeds to correct him by saying cretin with a long e and remarking if you are going to threaten me, do it properly.
* YouKillItYouBoughtIt: A non-fatal example occurs at the end of the film when Sulley unintentionally does away with Waternoose, the old establishment, and heading the company, remakes Monsters Inc. to seek children's laughter instead of fright for power. The energy crisis is averted.
[[/folder]]

[[folder:Tropes Specific to Promotional Material]]
* BewareOfViciousDog: Mike encountered one before Sulley helped him return to Monstropolis.
* CanonDiscontinuity: Sulley asked Mike if they remember going to the fifth grade. They haven't been to the fifth grade together.
* EarlyInstallmentWeirdness: The teaser, by dint of being produced before the movie itself, has several moments that don't gel with ideas established in the finished movie:
** Sulley and Mike go inside the kid's bedroom together. In the movie, only Sulley goes in while Mike stays outside to maintain canisters and bring in doors.
** Mike casually picks up a hula hoop with nothing suggesting fear of it. In the movie, monsters (Mike included) are terrified of touching objects children have touched under the belief they're toxic to them.
** Sulley and Mike mention attending the fifth grade together, when ''WesternAnimation/MonstersUniversity'' {{retcon}}ned it so they first met in university instead. Sulley also states that he was the studious one and Mike was the one who slacked off in class, when it is the exact opposite in the movie.
* HowIsThatEvenPossible: In the charades trailer, Sulley correctly guessed Mike's charade quickly and Mike asked Sulley "How did you do that?"
* {{Narrator}}: James Coburn (the voice of Mr. Waternoose) narrates the teaser.
* OhCrap: Mike looks absolutely terrified after hearing the [[BewareOfViciousDog growl of an angry dog]]
[[/folder]]
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-->''[[Music/RandyNewman ♫ I wouldn't have nothing if I didn't have you... ♫]]''
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to:

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!All spoilers below are unmarked. [[Administrivia/YouHaveBeenWarned You Have Been Warned.]]
[[quoteright:296:https://static.tvtropes.org/pmwiki/pub/images/monsters_inc_uk_poster.jpg]]
[[caption-width-right:296:''[[{{Tagline}} You won't believe your eye.]]'']]

->''"We're M.I. Monsters, Incorporated. We scare because we care."''
-->-- '''Henry J. Waternoose III, CEO'''

''Monsters, Inc.'' is the fourth animated film produced by Creator/{{Pixar}}. It is directed by Creator/PeteDocter, with the screenplay by Andrew Stanton and Daniel Gerson, and the story by Docter, Jill Culton, Jeff Pidgeon and Ralph Eggleston. It was released on November 2, 2001.

Welcome to Monstropolis, a city in a world where monsters are just regular folks like you and me. When they emerge from your closet and scare you, it isn't [[ForTheEvulz because it gives them any sort of thrill]], but simply because [[PunchClockVillain it is their job]]. Their world, [[PortalNetwork linked to ours through closet doors]], derives all its electrical power [[EmotionEater from our screams]].

However, scaring children isn't safe or easy work. The monsters believe that human children are highly toxic and only the bravest and most talented venture into a kid's bedroom. The populace live in terror of the possibility that a kid might find their way back through the door into the city, especially since this generation of kids are harder to frighten due to violence becoming more commonplace in media, and kids becoming desensitized, as a result. The difficulty in scaring children and the constant scrutiny of the CDA (Child Detection Agency) has led to a power shortage as Monsters, Incorporated, a major energy company using screams as their power source, struggles to keep the city lit.

Now meet our heroes, [[TheHero James P. "Sulley" Sullivan]] (Creator/JohnGoodman) and [[PluckyComicRelief Mike Wazowski]] (Creator/BillyCrystal). Sulley, [[GentleGiant the big blue one]], is the top "scarer" at Monsters Inc. Mike, the small green one, is his partner (who handles the paperwork), [[VitriolicBestBuds best friend]], personal trainer, and roommate, who spends his after hours courting the receptionist Celia Mae (Creator/JenniferTilly). They also happen to be days away from breaking the All Time Scare Record.

Life is great -- until one of the ''extremely'' poisonous fuel sources enters their world and threatens everything. Yes, '''a human child!''' Doom-doom-'''doom!''' (Actually, she is [[CheerfulChild rather adorable]].) Sulley and Mike's friendship becomes increasingly strained as they try to get the little "terror" back to her world without getting contaminated or arrested. Along the way, they stumble upon a conspiracy that threatens to undermine their life's work -- and possibly their lives.

A prequel was released twelve years later in 2013 titled ''WesternAnimation/MonstersUniversity'', which centers around Sulley and Mike in their college days.

A follow-up DVD short, ''WesternAnimation/MikesNewCar'', was released with the ''Monsters, Inc.'' DVD. There also is a comic book sequel titled ''ComicBook/MonstersIncLaughFactory''. A SpinOff [[RecycledTheSeries television series]] titled ''WesternAnimation/MonstersAtWork'' premiered on Creator/DisneyPlus in 2021, which is an ImmediateSequel set the day after the events of ''Monsters Inc.''. The world of the film was also featured in ''VideoGame/KingdomHeartsIII'' with an original story taking place after the events of the film.

'''Previews:''' [[https://www.youtube.com/watch?v=Ue_SfrHHBAc Teaser Trailer]], [[https://www.youtube.com/watch?v=8IBNZ6O2kMk Trailer]], [[https://www.youtube.com/watch?v=1gTnTnqqYdY Charades Trailer]]
----
!!''Monsters, Inc.'' provides examples of:

[[foldercontrol]]

[[folder:Tropes A-B]]
* AccidentalKidnapping: Randall, after bringing Boo's door to the Scare Floor for Sulley and Mike, traps Mike into a box and takes him away after Mike steps into the room and makes him think that he is actually Boo, whom Randall was baiting out. Randall doesn't realize this (even commenting the kid's put on a couple of pounds) until he tips the box over and ''Mike'' is the one who falls into the chair.
* AccidentalVentriloquism: Sulley sees part of Boo's disguise go down a trash chute and thinks she's been crushed into a cube. Meanwhile, Boo wanders into a group of monster children on a field trip. Sulley presents the garbage cube to Mike just as the kids are walking down the hall.
-->'''Sulley:''' ''(Weeping)'' I can still hear her little voice!\\
'''Boo:''' Mike Wazowski!\\
'''Mike:''' Hey, I can hear her too.\\
'''Other kids:''' Mike Wazowski!\\
'''Mike:''' How many kids you got in there?
* ActingUnnatural: Sulley and Mike try to help a disguised Boo back to her door on the scare floor without looking suspicious.
-->'''Mike:''' We're just two regular joes on our way to work. We will blend right in.\\
''(Sulley and Mike enter the scare floor)''\\
'''Sulley:''' Top of the mornin', fellas!\\
'''Mike:''' Hey, what's shakin', bacon?\\
'''Sulley:''' Did you lose weight? Or a limb?
* ActorAllusion:
** [[Creator/SteveBuscemi Randall]] threatens his assistant with, "If I don't see a door in my station in 5 seconds, [[Film/{{Fargo}} I will personally put you through the shredder!]]"
** In a [[https://www.youtube.com/watch?v=vZIY2-kH-wE teaser trailer]], Sulley and [[Creator/BillyCrystal Mike]] play Charades, and one of Mike's guesses is [[Film/WhenHarryMetSally "When Harry Met Sulley"]].
** Mike imitates an umpire when he and Sulley dispose of Randall, alluding to Billy Crystal's well-known love of baseball.
** The monster Fungus is performed by Creator/FrankOz, who performed several well known monsters on ''Series/SesameStreet'', particularly Grover and Cookie Monster.
* AerosolSprayBackfire: While hiding Boo in Sulley and Mike's apartment from the authorities, Mike tries keeping her away from him with a can of aerosol spray, only to wind up accidentally [[EyeScream spraying himself in the eye]] with it.
* AlasPoorVillain: One can't help but feel sorry for Waternoose, who only wanted to save his family's company and ensure Monstropolis still had power, except that his methods for going about it weren't the best. Still, his fate of going to jail was at least better than being banished like Randall.
* AllAnimalsAreDogs: Sulley tries to get Boo's attention by getting her to fetch a toy "bear", and makes a bed for her out of newspaper in the corner. [[CharacterDevelopment He learns to treat her better.]]
** Mike also joins in by telling her to go fetch a stick. [[CharacterDevelopment He, too, learns his lesson.]]
* AllCGICartoon: One of the first feature-length examples of the twenty-first century.
* AllForNothing:
** The point of the CDA's decontaminations, when it is discovered that humans and their possessions are not toxic after all. They put a force field around a building, just because a human kid was in it, as an 835 call, for crying out loud!
** Randall and Waternoose's EvilPlan ultimately proved pointless after the monsters discovered an alternative, more ethical method of gaining energy. Both monsters' lives were disgraced and ruined due to clutching the VillainBall.
* AllMythsAreTrue: Cryptids such as the Loch Ness Monster and Bigfoot are actually ex-citizens of Monstropolis who have been banished to the human world.
* AllThereInTheManual: Boo's full name. It is [[TheDanza Mary Gibbs]]. Her first name is revealed in the film, since she signs all her sketches, but it is hard to spot.
* AlwaysSecondBest: Randall Boggs is always the second best performer on the Scare Floor behind James Sullivan. This explains why Randall is eager for the evil plan to topple Sullivan even before James and Mike are aware of the operations.
* AmazingTechnicolorPopulation: Many monsters have a clear animalistic appearance that have an unnatural color scheme. Here are some examples:
** Sulley, who is blue and resembles a bear.
** Randall, who is purple and looks like a lizard and a snake.
** Celia's hair, which consists of five purple rattlesnakes.
** Waternoose, who is gray and looks like an arachnid and a crustacean.
** Many other monsters are in bright colors--Mike is a light green, Celia mentioned above is purple, and George is orange with yellow stripes, among other examples.
* AmusingInjuries: Mike is frequently subjected to these throughout the movie. The amusement they bring to Boo is actually a plot point as they eventually realize that Boo’s laughter at these amusing injuries is a more powerful energy supply than traditional screams.
* AnythingButThat: When the CDA enter the Scare Floor on a 2319 call, Waternoose groans, "Oh, not the CDA."
* ArtisticLicenseHistory: After George Sanderson gets subjected thrice to "code 2319" indignities, his assistant tells him that he'll next be sent on an easy scare job in, "Nice... quiet.. ''Nepal''." In reality, during the film's production, Nepal had been embroiled in [[https://en.wikipedia.org/wiki/Nepalese_Civil_War civil war since 1996]]. And four months before the film's November 2001 release, the King and Queen and eight other members of the royal family were killed in [[https://en.wikipedia.org/wiki/Nepalese_royal_massacre a bizarre massacre in the royal palace]].
* AstonishinglyAppropriateInterruption: "I said… ''Sulley?!''"
* BabySeeBabyDo:
** When Sulley shushes Boo, she copies the gesture and says, "Shh!" back.
** When Mike does a rambling speech that involves his name, Boo repeats it and she ends up liking to say his name, even giving it when asked, "What's your name?".
* BadBoss: Randall is very rude and abrasive toward his assistant Fungus, their relationship being [[{{Foil}} totally opposite]] to [[HeterosexualLifePartners Sulley and Mike's.]] It is telling that when Fungus is seen at the end without Randall, he is much happier.
* BadToTheLastDrop: Whatever it is they drink instead of coffee, it is a thick sludge that slowly oozes out of the dispensers.
* BaitAndSwitchComment: Mike has a RunningGag where he sees some bit of publicity with his face obscured and says things like, "I don't believe it... I'm on TV!"
* BenevolentMonsters: The monsters scaring children at night is just business. They would be perfectly content to leave humans alone if they weren't dependent on screams for energy. Indeed, when Sulley accidentally scares Boo, he realizes through her trauma just how he's been appearing to so many children in the past. When he switches the company to laugh power, he and the other monsters are a lot happier.
* BigBad: Randall seems to be this at first, as he plots to kidnap children which to use a Scream Extractor machine on to solve the energy crisis for the sake of becoming rich and famous, but then turns out he's been employed by Mr. Waternoose, who takes over the role when Randall is beaten.
* BigBadDuumvirate: Randall and Waternoose are responsible for the danger in this plot as a team and Sulley and Mike must stop their plans to kidnap children.
* BigDamnHeroes:
** Sulley, to save Boo from the Randall's machine.
** Boo herself returns the favor when she beats the snot out of Randall to stop him from making Sulley [[DisneyVillainDeath fall to his death]].
%% Administrivia/ZeroContextExample entries are not allowed on wiki pages. All such entries have been commented out. Add context to the entries before uncommenting them.* BigGood: Roz
* BigNo:
** Mike yells one in the teaser trailer after he requests Sulley to open the door.
** Sulley lets one out when he sees the trash that he thinks has Boo inside it about to go through the trash compactor. It is muffled behind a sheet of glass.
** Sulley, seven times after he and Mike are banished, six of which are one after the other as Sulley repeatedly opens and slams the door.
** Randall when Sulley hurls him through a door in the door vault to banish him.
** Sulley when Waternoose knocks him down and attempts to kidnap Boo in the scare simulator.
* BigRedButton: The scare floor has a red panic button in case a contamination alert arises. When Charlie calls for a 2319, Jerry activates the alarm and the CDA is summoned.
* BigShutUp: Needleman to Smitty at the beginning.
-->'''Smitty:''' Go get 'em, Mr. Sullivan!\\
'''Needleman:''' Quiet! You're making him lose his focus.\\
'''Smitty:''' Oh, no. Sorry!\\
'''Needleman:''' ''Shut up!''
** It goes further in the HilariousOuttakes segment, where Smitty ends up BreakingTheFourthWall.
* BigWhat: Mike to Sulley in the door vault after doing a flip and landing [[GroinAttack on his crotch on a girder]], and Sulley noticing too late that Boo's costume covered her face so she didn't see the flip, so he hurt himself for nothing.
* ABirthdayNotABreak: Celia's birthday date at Harryhausen's is thrown into disarray when Sulley intrudes midway through and accidentally releases Boo inside the restaurant. Celia herself is forced to wear a ConeOfShame afterwards and is naturally furious with Mike over her ordeal, calling it one of the worst nights of her life.
* BlackComedy:
** Sulley watching what he thinks is Boo go through through increasingly more outlandish trash compacting methods. Of course, the audience knows she is not in there.
** Late in the movie, Mike tries to apologize to Sulley for refusing to help him in the Himalayas. The only problem is that Randall is currently [[CurbStompBattle beating up Sulley]] while invisible, with Mike being [[ShutUpAndSaveMe completely oblivious]] even as Randall is about to ''choke him to death''.
** The reoccurring gag of the CDA attacking George Sanderson also applies, especially as he gets more and more injured as the movie goes on.
* BlaseBoast: Mike when talking to Celia at the beginning:
-->'''Celia:''' So, uh, are we going anywhere special tonight?\\
'''Mike:''' Ah, I just got us into a little place called, um, Harryhausen's.\\
'''Celia:''' ''(gasps)'' Harryhausen's!? But it's impossible to get a reservation there!\\
'''Mike:''' Not for googly-bear.
* BlowingARaspberry: Boo blows one when Randall is banished.
* BookEnds: A musical example. The closing credits' theme, "If I Didn't Have You", is actually a remix of the opening credits' theme.
* BoringButPractical: Mike wants to drive Sulley to work in his red convertible, but Sulley insists that, because of the energy crisis, they walk.
-->'''Mike:''' Okay, Sulley, hop on in.\\
'''Sulley:''' Nope. Uh-uh. Uh-uh. ''[Keeps walking.]''\\
'''Mike:''' Hey, hey, hey, hey... where ya going? What are you doing?\\
'''Sulley:''' Mikey, there's a scream shortage. We're walking.\\
'''Mike:''' ''Walking?''\\
'''Sulley:''' Yep.\\
''[Mike tries to climb into the car. Sulley grabs him by the arm, trying to pull him off.]''\\
'''Mike:''' No! Uh, no, no!\\
'''Sulley:''' Come on.\\
'''Mike:''' My baby! Look, she needs to be driven!\\
''[Sulley pulls him off and drags him along, with Mike calling back to the car.]''\\
'''Mike:''' Bye, baby! Uh, I'll call you!
* BowelBreakingBricks:
** After nearly being discovered by Randall in the bathroom, we see a huge splash in the stall Sulley, Mike, and Boo are hiding in. Boo sums it up best.
--->'''Boo:''' Ew.
** [[SubvertedTrope And then in the next scene, we see an up-close shot of Mike's legs completely soaked.]] [[DontExplainTheJoke It is implied he slipped and fell in, with Boo still understanding how gross that was.]]
* BreakUpMakeUpScenario:
** Sulley has one both with Boo (after accidentally scaring her) and Mike (who blames him for their banishment).
** Mike has one with Celia (over his absence ever since their last date) soon as she sees Randall in pursuit.
* BrickJoke:
** Sulley and Mike are arguing about Boo on Scare Floor F, when Mike realizes mid-sentence that everyone is watching. He tries to spin his line "Put that thing back where it came from or so help me...!" as practice for the company play. During the credits, the cast performs "Put That Thing Back Where It Came From Or So Help Me: TheMusical."
** Mike then tells confused scare floor workers and CDA agents, "we'll need ushers." At the end, a CDA agent is working as an usher.
** Sulley puts the stuff from Boo's room in a locker. Guess who opens that same locker a few scenes later?
** The first scene in the first issue of ''Laugh Factory'' is a new company commercial, this time ending with the logo on ''Sulley's'' face instead of Mike, much to his chagrin.
* BrokenPedestal: Waternoose becomes this to Sulley when the latter finds out the former's plans to kidnap children to solve the energy crisis.
* BruiserWithASoftCenter: Top scarer James P. Sullivan has SuperStrength and a mighty roar, but is really a sweet guy under it all.
* ButtMonkey: Mike, which cracks up Boo to no end.
[[/folder]]

[[folder:Tropes C-D]]
* CallASmeerpARabbit:
** Boo affectionately calls Sulley "[[CuteKitten Kitty]]."
** "Little Mikey", the stuffed animal that Mike doesn't want Boo touching, is described as a bear (despite having one eye, several legs/tentacles, fangs and horns).
* CallingYourNausea: Mike says, "I'm gonna be sick!" while riding on the door vault, but he never vomits.
* CassandraTruth: A {{subverted|Trope}} example occurs when Celia demands that Mike tell her what's going on, which he does. Barely an instant after asking Mike if he expects her to believe it, Celia sees Boo, then the pursuing Randall, and realizes that Mike ''is'' telling the truth.
* CastingGag: Possibly unintentional, but in ''Film/TheBigLebowski'', Creator/JohnGoodman's character is an overconfident {{Jerkass}} with a HairTriggerTemper and Creator/SteveBuscemi's character is an affable NiceGuy. In this film, the two actors have essentially swapped characters, as Sulley (Goodman) is a GentleGiant and Randall (Buscemi) is pretty much a CardCarryingVillain[[note]]Especially funny since Goodman's character in ''Lebowski'' was constantly bullying Buscemi's character[[/note]].
* CasualDangerDialogue: After Randall has kidnapped Mike (mistaking him for Boo) and has him cornered in a chair:
--> '''Randall:''' Where is it, you little one-eyed creh-tin!?\\
'''Mike:''' Okay, first of all, it's ''cretin''. If you're gonna threaten me, do it properly.
* TheCatCameBack: Boo, when she first meets Sulley.
* ChangedMyMindKid: After both get exiled to the Himalayas, Mike angrily abandons Sulley over the latter essentially ruining his life and constantly ignoring him in favor of Boo. He rejoins Sulley a few minutes later, just in time to [[BigDamnHeroes save him from Randall]].
* CheatedAngle: The closet doors. When closed, they are almost always seen directly from the front. But when open, they are almost always seen from an angle. And they are only rarely seen from behind, mostly after Sulley and Mike are sent away to the Himalayas, but there are a couple of other exceptionally brief glances.
* CheerThemUpWithLaughter: After all of her mishappens in the monster world, little Boo is terribly scared. Seeing that she has previously found Mike suffering {{Slapstick}} Comedy hilarious, Sulley gets Mike to do just that in order to make Boo feel better.
* ChekhovsBoomerang: The scare simulation room seen in the opening comes back twice, both times causing major plot relevations. The first time it comes back, Sulley accidentally scares Boo and Waternoose's treachery is revealed, while the second time the room's cameras are used to capture Waternoose's AccidentalPublicConfession.
* ChekhovsGun:
** Boo's laughter is shown to be powerful enough to blow the power for an entire city block. Guess what becomes the new power source for the company.
** Socks (supposedly) being toxic to monsters. First used as part of a gag to illustrate how serious the CDA are about avoiding contamination, then during the climax, Mike throws a sock at one of the agents to distract them.
* ChekhovsSkill:
** Boo's ability to say "Mike Wazowski."
** It is noted throughout the film (and through its prequel) that most of the monsters aren't naturally scary, Mike being the stand-out example, and when caught off guard can even evoke joy or laughter from the children they victimize. This ends up becoming ''very'' pivotal during the end.
* TheChewToy: George Sanderson, as a RunningGag, keeps getting articles of clothing caught on his fur, resulting in numerous humiliating 2319 calls. Sometimes Mike, although it is usually his own fault.
* ComicallyMissingThePoint:
** At one point, Sulley protests about Boo being in the restroom, not because she is human, but because she is a girl in the men's bathroom.
--->'''Mike:''' That is the weirdest thing you have ever said.
** Mike later, when Randall is trying to make a deal with him.
--->'''Randall:''' What happens when the whistle blows in five minutes?\\
'''Mike:''' Uhh, I get a time-out?\\
'''Randall:''' Everyone goes to lunch! Which means the Scare Floor will be...\\
'''Mike:''' ...Painted?\\
'''Randall:''' EMPTY! It'll be empty, you idiot!
** Also, when Mike tries to apologize to Sulley while remaining completely oblivious to the fact that Sulley is being beaten up by an invisible Randall.
--->'''Sulley:''' I'm being attacked!\\
'''Mike:''' No, I'm not attacking you. I'm trying to be honest.\\
'''Boo:''' ''[runs up and tries to babble at Mike frantically]''\\
'''Mike:''' I know kid, he's too sensitive!
** When Celia angrily confronts Mike the day after the raid at Harryhausen's in which she got injured, Mike thinks it's because Celia did not like sushi.
* ComicallySmallBribe: When Mike is strapped into the Scream Extractor, he decides to bribe Fungus with his red convertible, but reconsiders giving him the car mid-sentence.
-->'''Mike:''' Psst, Fungus. Fungus? You like cars? Huh? 'Cause I got a really nice car. You let me go, I'll give you... [[LastSecondWordSwap a ride, in the car]].
* ComicBookAdaptation:
** Creator/DarkHorseComics published a one-shot comic that adapted the events of the film.
** Boom! Studios did a {{sequel}} of sorts in a four-issue miniseries titled ''ComicBook/MonstersIncLaughFactory'', which featured Randall's return, Mr. Waternoose's escape from prison, Sid Phillips from ''WesternAnimation/ToyStory1'' using the closet doors to his advantage, and the subsequent team-up of the three.
* CompanyCrossReferences:
** Among the toys seen in Boo's room are Jessie and the ball with the star design from ''Franchise/ToyStory'', and Nemo from ''WesternAnimation/FindingNemo'' (which hadn't released yet).
** The outtakes feature Rex from ''Toy Story'' in place of a giant monster who appears in the film proper waiting near the street.
* ConeOfShame: Monsters who undergo decontamination by the CDA due to a 2319 or 835 call end up wearing one. Celia's hair snakes all get individual cones in addition to the one she has to wear around her neck.
* ConfusedBystanderInterview: After Boo's presence is discovered, "witnesses" claim to have seen her use laser vision and mind powers.
* ConvenientPhotograph: When Randall asks Mike about the human, Boo, that was spotted in the sushi restaurant, Mike lies that he was nowhere near the restaurant and throws suspicion at a coworker, so that he and Sulley can get Boo back home before the authorities bust them for illegally harboring a human. As they walk towards the scare floor to get Boo's door, Celia, Mike's girlfriend angrily berates him for running away [[ConeOfShame and leaving her to get processed]] when the authorities burst into the restaurant. Hearing the scolding, Randall then notices that the newspaper has picture taken inside the restaurant that shows Mike making a break for it.
* CoolGate: Closet doors in childrens' bedrooms are these when activated from the monster's side.
* CopycatMockery: When Randall asks Mike if he hears the "winds of change" (referring to him beating Sulley), Mike repeats it in a mocking voice.
* CorporateConspiracy: The conspiracy at Monsters, Inc. was set into motion by a few bad apples rather than the whole corporation, but it still counts — Randall Boggs along with Henry J. Waternoose III formulates a plan to solve the coming energy crisis by kidnapping children and subjecting them to the Scream Extractor, all while maintaining the superstition that humans are poisonous.
* CorruptCorporateExecutive: Mr. Waternoose is all but determined to keep his company from going into the red ink, even if it means breaking the law.
* CreatorCameo: Director Pete Docter voices the CDA agent who announces that Harryhausen's is ready for decontamination as part of an 835 call.
* CurbStompBattle:
** Sulley and Randall's first battle is barely even that: Randall turns invisible and effortlessly [[NoHoldsBarredBeatdown beats the crap out of Sulley]] before choking him to near-death. Only [[AccidentalHero Mike's intervention]] stopped him from outright killing Sulley.
** Boo versus Randall.
* CutTheJuice: Randall tries to use the Scream Extractor to coerce Mike into telling where Boo is. As the extendable mask-like part of the machine gets closer and closer to him, Mike begins panicking and even attempts to purse his lips in a futile attempt to stop it. Sulley, who has been watching from hiding, secretly unplugs the machine before it can do anything else, then frees Mike while Randall is checking the power source.
* {{Cyclops}}: Mike, his "teddy bear" Little Mikey, and Celia are the most prominent examples. There are several other one-eyed monsters that appear as background characters.
* DangerDeadpan: Upon mistaking Randall for a gator, a teenage boy reports "Mama! Another gator got in the house," with no more excitement in his voice than as if he was announcing a pizza delivery.
* TheDarknessGazesBack: In the opening.
* DeadpanSnarker: Mike. Also Roz, whose incredibly deadpan voice often gives Mike the creeps.
-->'''Roz:''' And I'm ''sure'' you filed your paperwork correctly... for once.\\
''[A {{Beat}} as Mike's eyes widen in horror.]''\\
'''Roz:''' [[SarcasmMode Your stunned silence is very reassuring.]]
* DeathGlare:
** When Sulley scares Boo by accident and doesn't notice until it is too late.
** Randall to Waternoose after the line: "Sullivan was ''twice'' the Scarer you will ''ever'' be!"
** Finally, when Boo is about to attack Randall in the door vault.
* DeepSouth: Randall's final fate is getting trapped in a trailer and getting wailed on by a swamp lady who thinks he is an alligator.
* DefendsAgainstTheirOwnKind: Sulley and Mike go to great lengths to keep Boo safe from authorities.
* DesignStudentsOrgasm: The opening credits.
* DestroyTheVillainsWeapon: Downplayed. Sulley doesn't destroy the Scream Extractor so much as break it off from a part holding it upwards and throw it at the villains.
* DetachableDoorknob: The original story treatment concerns Johnson as he tries to scare one more kid to save his job. However, as he enters Mary's bedroom, he accidentally breaks the doorknob and tries to fix it. After Mary ambushes him (thinking it's one of her brothers trying to prank her) and accidentally gets whisked away to the Monster World, Johnson tries to open the door to return her to her world. Unfortunately, the doorknob on the other side breaks as well and the door has to be sent to the repair department.
* DidYouActuallyBelieve: Mike and Randall.
-->'''Randall:''' (''evil chuckle'') You still think this is about that stupid scare record?\\
'''Mike:''' Well, I did... right up until you ''[[LampshadeHanging chuckled]]'' like that...
* DishDash: Of the spinning dishes on sticks variety.
* DisneyVillainDeath: During their confrontation in the door factory, Randall attempts to kill Sulley this way by knocking him out of a door and almost sending him falling to his death. Only Boo's intervention stops it.
* DoesThisRemindYouOfAnything: Randal interrogates Mike in the hallway a lot like a [[TheMafia mafia]] hit man, getting in his face, making him answer his own questions, mild-but-threatening violence and even giving him a "''capisce''" hand gesture when he asks if he'd made himself clear.
* DogPileOfDoom:
** CDA agents pounce on George in the locker room after he opens the door to his locker and the [[BrickJoke toys Sulley shoved in there]] fall on him.
** Immediately after Sulley and Mike get a disguised Boo through the swarm of CDA agents in the lobby, a detector machine squeals and a bunch of agents chase a random factory worker offscreen. Going by the dialogue, leaping CDA agents and [[OffscreenCrash thumping sound effects]], the factory worker is [[ImpliedTrope presumably]] dogpiled. [[FromBadToWorse Then]] something that sounds an awful lot like a dentists drill starts up.
--->'''Agent 1:''' Halt! Stop him!\\
'''Agent 2:''' Hold him down.\\
''(Worker screams as the drill starts up)''
* DontCallMeSir: The easygoing Sulley has a brief moment asking ThoseTwoGuys not to call him Mr. Sullivan.
* DontLookDown: Stated by Sulley early on in the door vault scene (shortly before the rollercoaster drop).
* DoorHandleScare: After managing to capture Boo, Sulley goes back to her door to send her back, and as he reaches for the knob it suddenly starts to turn. The next shot is of Sulley's rival, Randall, coming out of the door. He deactivates the door, and as it is lifted up to be stored away, it leaves Sulley, who had been hiding behind the door, exposed. Thankfully, Randall never looks back.
* TheDoorSlamsYou: Happens twice to Randall in the door vault. The first door that Sulley, Mike, and Boo go through is slammed just as he reaches it. A little later, Mike slams another door in his face, trapping two of his antennae ("I hope that hurt, lizard boy!").
* DramaticIrony: [[PlayedForLaughs Played heavily for laughs]]. In a ShoutOut to ''WesternAnimation/FeedTheKitty'', Sulley believes Boo to be trapped in the trash compactor during one scene, and looks horrified as he believes Boo is being mutilated in the [[BlackComedy most horrible ways imaginable.]] The audience already knows Boo got away and she's just fine.
[[/folder]]

[[folder:Tropes E-F]]
* EasilyForgiven: Fungus's presence on the laugh floor indicates as much. Justified seeing that he was under Randall's thumb and stops being that way after Randall's defeat.
* EiffelTowerEffect: During the "Chase Through Doors" section Sulley, Mike and Boo run through rooms that have views on [[UsefulNotes/{{Japan}} Mt. Fuji]] and [[UsefulNotes/{{France}} the Eiffel Tower]].
* EmbarrassingAdGig: Subverted. When Mike's one shot on the new company ad has his face covered up by the logo, he at first appears shocked and disappointed. But then he shouts enthusiastically "I was on TV!"
* EmotionEater: The entire world is powered by children's screams of fear. As they discover later, though, they get ''more'' power from laughter.
* EmployeeOfTheMonth: In the early part of the movie, we see that Monsters Inc. has an employee of the month program; and every single one was won by James P. Sullivan.
* EngineeredPublicConfession: Mr. Waternoose's near the end of the film.
* EsotericHappyEnding: {{Discussed|Trope}} InUniverse. Mike mentions that even though he and Sulley saved Boo, they destroyed the company, put their fellow employees out of a job, and doomed Monstropolis to a powerless fate. Or at least, they ''would'' have, if he didn't give Sulley the idea to switch to laugh power.
* EtTuBrute: How Sulley felt towards his mentor and close friend Waternoose.
* EurekaMoment:
** When Mike said that he and Sulley would have to start a whole new life far away to keep from getting killed by Randall, he says "Goodbye, Mr. Waternoose!", which gives Sulley the idea to go to Waternoose for help. Subverted when it is revealed that Mr. Waternoose was in on the scheme. Still, ItSeemedLikeAGoodIdeaAtTheTime.
** Then again, towards the end of the film:
--->'''Mike:''' At least we had some laughs, right?\\
'''Sulley:''' Laughs...
* EveryoneHasStandards: The whole monster world might scare children as an energy source, but they would never ''hurt'' a kid. And the idea of kidnapping them is not only a crime, but seen as just plain wrong.
* ExtraEyes: Several monsters, mostly background characters, have more eyes than the average mammal, bird, or reptile. The most prominent ones are Waternoose and Fungus, who have five and three eyes, respectively. The monster with the highest amount of eyes is the green "witness" of Boo's attack on Harryhausen's, who has twenty eyes in total!
* ExtremelyShortTimespan: The bulk of the film takes place over the course of two days.
* EyeScream:
** When Boo sneezes on him, Mike [[IdiotBall sprays his eye with disinfectant]], leaving it looking very irritated.
** One of Mike's attempts to make Boo laugh is [[ThisIsGonnaSuck reluctantly]] self-inflicted: pulling his eyelid and snapping it like an elastic band against his eyeball.
* TheFaceless: Every CDA member, with the exception of #001: Roz.
* FaceplantingIntoFood: When a commercial mentions that kids are getting harder to scare, a clip is shown of a boy sleepily watching a movie and faceplanting into a bowl full of cereal.
* FailedAttemptAtScaring: A major plot point is that today's kids are harder for the monsters of M.I. to scare, resulting in an energy crisis caused by a scream shortage. Not helped by the fact that monsters think human kids are extremely toxic, making their jobs even tougher.
* FaintInShock: When Sulley watches ([[DramaticIrony what he thinks is]]) Boo getting crushed in the trash compactor, he faints four times: First after seeing the trash being pounded by two big hammers, again after seeing it being rolled flat, a third time after seeing it being chopped into cubes, and a fourth time when the cubes come out and he makes to try and pick up the one that he thinks has Boo inside it.[[note]]This a ShoutOut to ''WesternAnimation/FeedTheKitty'', when Marc Anthony thinks that Pussyfoot is being baked into cookies.[[/note]]
* FastRoping: How [[TheMenInBlack the CDA, or Child Detection Agency]], enter a scare floor when the 2319 alarm is pulled. [[HilariousOuttakes With varying degrees of success.]]
* FightingAcrossTimeAndSpace: Toward the end, Mike and Sulley are chased by Randall, who wants to take possession of Boo. This takes place in the PortalNetwork door factory where every door leads to a different room on Earth, so they go through a number of different locations while trying to outrun Randall. It's also a DontLookDown situation because the door factory production is very high up and the fall would be fatal. Randall eventually takes Boo from Mike and Sulley but is bested when, while trying to HandStomp Sulley off the door's edge, Boo sneak-attacks Randall from behind. Mike and Sulley throw Randall into a door leading to a swamp house, where he is mistaken for an alligator and beaten with a shovel, and Mike and Sulley shatter the door from the "outside."
* {{Fingore}}: Happens to Mike twice, first when Roz closes the window to the help desk on his fingers, then when a kid bites his index finger.
* FirstNameBasis: Mr. Waternoose is the only character to refer to Sulley by his first name, James. Randall does it once while talking to Mike and he himself is referred to only by his first name and we only find out his surname of Boggs from Celia.
* FiveSecondForeshadowing: At one point, this exchange occurs:
-->'''Waternoose:''' ''(lecturing a group of trainee Scarers)'' How many times do I have to tell you? It's all about presence. About how you enter the room!\\
''(cue [[DynamicEntry Sulley and Mike bursting in]])''
* FlushTheEvidence: After he attempts to put Boo back in her room, Sulley gets some of her toys tangled around his person. He tries to flush them all down the toilet, [[SubvertedTrope but it gets backed up]], so instead he hides them inside a locker, [[BrickJoke where they reappear later in the movie.]]
* {{Foreshadowing}}: Used several times throughout the film.
** In the company commercial, Waternoose mentions research into new energy techniques. This apparently includes a means to extract screams from children.
** "James, this company has been in my family for three generations. I would do anything to keep it from going under." Up to and including kidnapping children to harvest their screams, even.
*** Waternoose's involvement in the EvilPlan is made apparent by the very existence of the secret door and the scream extractor underneath the factory. Even if Randall could have built the machine himself from parts scavenged around the factory and making use of the abundance of Scream canisters, there is no way he would have been able to set up such an elaborate concealment method for the entrance without being caught unless he also had aid from the owner of the factory himself.
** "I'm always watching you, Wazowski. Always watching. ''Always''."
** "Just think about a few names, will ya? Loch Ness, Bigfoot, ''The Abominable Snowman''. They all got one thing in common: banishment! We could be next!" Guess who Sulley and Mike meet after they get banished?
** Boo's crying causes the lights to flicker in Sulley and Mike's apartment because, of course, screams of children are what are used as power in the monster world. However, her laughter causes a much stronger overload to the point of causing a total power failure. This is how Sulley discovers that laughter is more powerful than screams.
** Mike's line to Sulley in the locker room: "There's more to life than scaring."
** When Sulley assures Boo that no monster will come out of his closet to scare her while she is sleeping in his bed, he says that he won't either because "[he's] off-duty." He accidentally scares her while he is on duty later.
** While hiding from Randall and Fungus in the bathroom, Randall tells Fungus to get "the machine" up and running, and that he (Randall) will take care of Boo. Said machine turns out to be the scream extractor which appears later that day.
** An extremely subtle one, but when Mike is running away from Randall (who is shown lying in wait for Mike), Randall is camouflaged right near one of Mr. Waternoose's portraits. Randall and Waternoose were later revealed to be working together.
** "One of these days... I'm going to let you teach that guy a lesson."
** Boo reveals through her drawings that Randall is the monster assigned to her, and is thus the best designated to scare her out of the ''entire company''. This becomes relevant much later when Randall becomes her, Sulley, and Mike's biggest threat and Boo is initially too scared to help.
** During the first 2319 and the first time the CDA show up, Roz slams the front panel of her desk shut. She later slams it shut [[AmusingInjuries on Mike's fingers]] after he reveals that Randall was working the scare floor the previous night while trying to get the card to Boo's door. The very next scene in the restroom opens with Randall being questioned by some CDA agents. At the end of the film it is revealed she is the head of the CDA.
** Randall's comment to Sulley and Mike about "the winds of change" seems like a random taunt, but then it is revealed he is the mastermind of the Scream Extractor, which he claims will "revolutionize" the scaring industry.
** Waternoose having SuperStrength on par with, or even eclipsing, Sulley's gets subtly teased when we first meet him. During his demonstration of screams being the monster's source of power, Waternoose casually holds a canister in one hand and is able to gesture with it like it was a pencil, while many other characters are seen straining to lift them.
** Throughout the film, every time a door goes online, we are purposefully shown the light above it going on, even within the Door Vault. When Sulley tricks Waternoose in the simulator room, we aren't shown the light on Boo's door, which only the most attentive viewers will actually catch, since Sulley deliberately works a keypad.
*** However, ''super'' attentive viewers might also notice that he actually presses a different button on the keypad than the one we've seen other characters use to activate a door.
** The few times Boo touches Sulley and vice versa, and when Boo's things dangle from Mike, they do not seem to suffer anything deadly; they are noticeably fine, even after hours. This is the first clue that children are not toxic as monsters thought.
* ForWantOfANail: If Mike hadn't forgotten to file his paperwork, Sulley wouldn't have found Boo, and Randall and Waternoose would never have been discovered.
* FourFingeredHands: In true American animated fashion, an average monster in this world has four digits on each hand. Sulley, Mike, and supporting characters like the Abominable Snowman, Fungus, George, Smitty, and Needleman showcase this.
** However, this being a world of monsters of various appearances, several characters avert this. Randall, Roz, and the CDA agents have three digits on each hand. Waternoose and Jerry have seven digits on each hand. Cephalopod (Charlie, Rivera, Tony, the Harryhausen's employees) and armless (Harley and his assistant, Waxford) are fingerless, either because their limbs are tentacles or because they don't have any arms at all.
** Celia has mit-like hands, and only has two thumbs as a result.
* FreezeFrameBonus:
** During the scene where Mike and Celia are looking at him on the magazine cover, there is a poster in the background labeled "The 10 Rules of Comedy". It is a little hard to make out, but the rules are:
--->1. Punchline doesn’t mean hit the kid.\\
2. Don't howl at your own jokes.\\
3. Tentacles funny. Really sharp claws not funny.\\
4. Multiple heads should speak one at a time.\\
5. No claws for tickling.\\
6. Scared kids don’t laugh.\\
7. Try not to hurt the audience.\\
8. Always keep sharp spikes in.\\
9. You don’t get a laugh if you don’t take a bath.\\
10. Never let them see you slobber.
** In the scene where a monster runs out of a child's room when she isn't scared of him, we can briefly see a poster inside the child's room. This poster was also seen in [[WesternAnimation/ToyStory1 Hannah's Room.]] And since the monster made it clear that it had been a girl's room...
* FullNameUltimatum: An angry Celia makes her presence known to Mike by shouting, "Michael Wazowski!" It stops him dead in his tracks and gives him an OhCrap moment.
* FunnyBackgroundEvent: When the local news is interviewing one of the witnesses from Harryhausen's talking about the child using its "mind powers" on him, a monster holding a baby can be seen behind him nonchalantly waving to the camera, and then moving their baby's hand to make it wave.
* FunWithFlushing: Sulley gets some of Boo's toys tangled up on him when he re-enters the monster world. He tries to get rid of them by flushing them down the toilet, but it gets clogged up and overflows. He then has to dump them in someone's locker, where they reappear later as a BrickJoke.
* FunnyOctopus: There is an octopus-like sushi chef working in the restaurant named [[InJoke Harryhausen's]]. Like all the patrons, this octopus character is terrified of the human toddler Boo.
* FurnitureBlockade: When Sulley is trying to save Boo from Mr. Waternoose, he runs onto the factory's training room and bends a metal pipe to lock the doors, keeping him at bay long enough to fetch Boo's door and return her to the human world.
[[/folder]]

[[folder:Tropes G-H]]
* GambitRoulette: Sulley and Mike's plan to get Waternoose to confess depended greatly on random chance, for instance the fact that the agents wouldn't follow Sulley after he pushed over the cans. But this is justified since they had less than a minute to come up with it.
* GenreBusting: It is a monster movie / kid flick / invasion movie / sci-fi / family drama / comedy.
* GilliganCut
-->'''Mike:''' What do you wanna do, walk out in public with that ''thing?'' And then I suppose we'll just waltz right up to the factory!\\
(''Sulley looks thoughtful; cut to outside the factory'')\\
'''Mike:''' [[YouJustHadToSayIt I can't believe we are waltzing right up to the factory!]]
* GlassSmackAndSlide: The "bloopers" shows one of the CDA members missing his entrance by FastRoping, the window pane not pivoting, and smacking flat against it before sliding down.
* GorgeousGorgon: Mike certainly thinks this way about Celia.
* GroinAttack: Sulley and Mike are trying to get Boo to laugh again to reactivate all the closet doors. Mike tries a trick where he lands on a metal bar right between his legs and is in notable pain. Even though you can't ''see'' anything, '''ouch'''.
* HandshakeRefusal: Before the scarers start working on the first day, Sulley turns to Randall at the next station, holds out his hand and says, "Hey, may the best monster win," expecting a handshake. Randall refuses to give one and simply says, "[[{{Narcissist}} I plan to]]."
* HaveYouToldAnyoneElse: Unlike most examples, it seems genuinely innocuous (since the one asking it is concerned about the company's welfare and, by extension, its public relations) until TheReveal.
* HeelRealization: After inadvertently scaring Boo, Sulley realizes how wrong scaring children is.
* HelpingAnotherSaveFace: Mike is about to go on his romantic dinner date with Celia when he realizes he forgot to file his paperwork. He's about to explain to Celia why he can't take her to dinner when Sulley says that Mike was reminding him to get his paperwork. Along with saving Mike's date, this also leads to Sulley meeting Boo, which starts up the plot.
* HelplessWindowDeath: Sulley can only watch in growing horror as the garbage pulverizer reduces Boo to a compact block. Subverted when it's revealed that only a piece of Boo's disguise went through the machine; Boo herself is alive and intact, much to Sulley's relief.
* HeterosexualLifePartners: They even have a song about it!
* HilariousOuttakes: Continuing the tradition with their last two films, fake bloopers were added a few weeks after the film's opening during the closing credits and later included on the home video releases. This was the last Pixar film to do this, as the creators felt that it was getting old (not to mention, it wouldn't be as convincing [[WesternAnimation/FindingNemo underwater]]). The Creator/DisneyPlus release doesn't include them, not even under the Extras tab.
* HopeSpot:
** A minor one for Randall at the beginning. At one point he seemingly manages to edge out Sulley's scare numbers and take the top spot...for about five seconds, until Sulley takes it right back thanks to a convenient slumber party.
** Near the end of the film, Sulley and Mike have defeated Randall and managed to find their way to Boo's door. Unfortunately the power surge caused by Boo enabling them to use the doors has expired, so now they have to open it again, and are unable to before Waternoose summons the door to apprehend them.
* HumansAreCthulhu: Monsters are led to believe that human children are incredibly toxic and dangerous. When Boo is seen by a crowd of monsters, the entire building breaks out into hysteria as the monsters panic.
[[/folder]]

[[folder:Tropes I-L]]
* IdealHero: How Mike views himself. Actually, it is Sulley, even though Mike is responsible for manning Sulley's day-to-day matters. See also TheLancer and {{Sidekick}}, both below.
* IDidWhatIHadToDo: Waternoose's justification for his involvement. He and Randall are working behind the scenes to solve the major energy crisis caused by kids' desensitization by kidnapping children and subjecting them to the Scream Extractor.
* IHaveJustOneThingToSay: ''*Mike pulls a sock out of his mouth and throws it*'' Catch!
* IKnowWhatWeCanDoCut: Combined with EurekaMoment at the end of the film. After Mike's comment "at least we had a few laughs", Sulley has his brainwave, and then the film cuts to the monsters using laughter as an alternative power source to screams.
* INeedToGoIronMyDog: The Yeti's excuse:
-->'''Yeti:''' Oh, would you look at that? We're out of snow cones.
** Subverted in that he really ''was'' going to make more snow cones, possibly to cheer the monsters up.
* InkSuitActor: Despite the fact that the cast is full of inhuman monsters, they still manage to resemble their voice actors. According to the DVDCommentary, Steve Buscemi accused the casting director of typecasting him when he first saw a sketch of Randall.
* {{Invisibility}}: Randall, being based on a chameleon and all.
* IronicEcho:
** When Mike parodies the training instructor from the start of the movie:
--->'''Mike:''' Well, I don't know about the rest of you guys, but I spotted ''several'' big mistakes.
** Both Sulley and Mike say "that's not her door" at different points in the movie. Sulley when Mike brings up a door that isn't Boo's, and Mike when Waternoose brings up an ominous metal door.
--->'''Sulley:''' Mike, that's not her door.\\
'''Mike:''' Uh, sir? That's not her door...
* {{Irony}}:
** The monsters are as afraid of the children as they are of them, due to the fact they believe their touch is lethal.
** After helping Waternoose exile Sulley and Mike to the Himalayas, Randall gets exiled at the end of the film.
* IsThatCuteKidYours: Waternoose asks Sulley this when he first sees Boo, though Sulley and Mike cover this [[BlatantLies by saying that she is Sulley's "cousin's sister's daughter" and that it is "Bring an Obscure Relative to Work" Day]]. Waternoose seems to go along with the idea. Later, the company's day care worker mistakes Sulley to be Boo's father as well.
* ItIsDehumanizing: Mike refers to Boo as "it" a lot in the first half of the film. He stops by the end.
* JumpingOffTheSlipperySlope: Waternoose did this quite a while ago when [he decides that ''nothing'' would stop him from saving his company.
* JumpRopeBlunders: At one point, some monsters are jumping rope, when one of them gets distracted saying goodbye to Sulley and Mike and thus gets tangled in the rope and [[EyeScream thrown into someone's eye]].
* {{Kaiju}}: Ted, a monster so large [[GentleGiant Sulley]] only comes up to about half his leg. He also clucks like a chicken, [[RuleOfFunny oddly enough]].
* KickTheDog:
** Intentionally performed by Randall on ''way'' too many occasions to count.
** Waternoose wasn't kidding about what he said with the promise to keep his company afloat, due to his kidnapping of Boo. Yes, he would do ''anything'' to keep it afloat -- even if it meant breaking the law.
* KickTheMoralityPet: Unintentionally performed by Sulley toward Boo, leading to a HeelRealization.
* KnightTemplar: Waternoose wants to save his family business and Monstropolis from collapse due to a power shortage. His "solution" drives him into would-be child slaughterer.
* TheLancer: How Mike views Sulley. Actually, Mike is TheLancer for Sulley. See also TheHero, above, and {{Sidekick}}, below.
* LargeHam: The Yeti / Abominable Snowman, who is [[RunningGag played by John Ratzenberger]].
** [[EvilIsHammy Randall]] is the oft-quirky Steve Buscemi in a [[CardCarryingVillain unabashedly mean role]], and he shows business [[IncomingHam right in his first line ("WAZOWSKI!")]].
* LastNameBasis: Sulley is usually referred to as Sulley or Sullivan. Mostly Randall calls him the latter. The only person to really refer to Sulley by his first name, James, is Waternoose. Mike is also referred to by his surname of Wazowski by Roz and Randall.
* LaughOfLove: We get the following exchange between Mike and Celia:
-->'''Mike:''' I just got us into a little place called, um, Harryhausen's.\\
'''Celia:''' ''[gasps]'' Harryhausen's? But it's impossible to get a reservation there!\\
'''Mike:''' ''Not'' for [[AffectionateNickname Googly-bear]].\\
''[Celia giggles]''
* LeaveNoWitnesses: This is how Randall and Waternoose attempt to deal with James, Mike, and Boo. Waternoose says "There can't be any witnesses" when James and Mike return to Monstropolis after their banishment.
* LetUsNeverSpeakOfThisAgain: After Sulley and Mike help [[ChekhovsGunman CDA Agent #1]] uncover Waternoose's conspiracy and return Boo home, she tells them "None of this ever happened, gentlemen. And I ''don't'' want to see any paperwork on this."
* TheLonelyDoor: The closet doors allow the monsters to access the human world via children's bedrooms.
* LovecraftLite: The proliferation of scales and tentacles and the inter-dimensional aspects. In addition, the trope is played with, in that the monsters regard the human world as a dangerous place and treat Boo like a pint-sized EldritchAbomination. This also counts as FridgeBrilliance; the monsters, many of which count as Eldritch Abominations, in turn consider ''us'' the real monsters.
[[/folder]]

[[folder:Tropes M-N]]
* MamaBear: Armed with nothing but a shovel, a mother in a trailer park defends her son by assaulting a monster who she thinks is an intruding gator.
* MammalMonstersAreMoreHeroic:
** Of the two top scarers at the company, Sulley, a big furry blue monster, is portrayed in a more heroic light than Randall, a scaly salamander-type monster. Sulley is a typical, hardworking company monster while Randall is revealed to be using underhanded means to get ahead. This is reinforced by Boo's reaction to each, calling Sulley "Kitty" while being terrified of Randall. The fact that they have both scared innocent children remains, {{downplay|ed}}ing the trope a bit. However, Sulley sees it as just his job and has a sincere HeelRealisation later on, whilst Randall seems to enjoy it more than he really should.
** This is also played straight with BigBad Waternoose being a spider-like creature willing to keep Boo from getting home to stop the company from shutting down. In contrast to Sulley, who is willing to risk his job and life to protect her.
** {{Zigzagged}} as other monsters like Mike and Celia are less mammalian than Sulley but are still seen as sympathetic, with Boo playing with and laughing at Mike multiple times.
* MatchCut: When Mike sarcastically tells Sulley that they'll waltz right up to the factory, the camera zooms into an armchair. It cuts to a close up of Boo's monster disguise, with the same texture of the armchair.
* MeanCharacterNiceActor: Roz and Randall enjoy good-natured jokes as the bloopers indicate.
* MeaningfulEcho: Albeit with an inversion.
-->'''Roz:''' And I ''don't'' want to see any paperwork on this.
* TheMenInBlack: The CDA. Extra points for being a complete inversion of the TropeNamer -- they're protecting unsuspecting ''monsters'' from hideous ''humans''.
* MinorCrimeRevealsMajorPlot: Sulley happens to stumble upon Randall apparently cheating the system by having a door at his station after hours, only to discover a much larger child-kidnapping conspiracy out of it that went all the way up to not only Randall, but also to Mr. Waternoose himself.
* MissedHimByThatMuch:
** Sulley, Mike, and Boo are hiding in a bathroom stall from Randall. Randall punches them open one by one, and Sulley flinches as every door opens. Before Randall can burst the stall the trio are hiding in however, his assistant Fungus points that Boo is on the front page. After a short discussion, Randall punches the door Sulley, Mike, and Boo are hiding in, but isn't looking at the time, and the door closes before he can spot them. Then he yells at Fungus and chases him out of the bathroom, demanding him to get to work on his plan.
--->'''Randall:''' You just keep the machine up and running, I'll take care of the kid. And when I find whoever let that kid out... THEY'RE DEAD! ''(punches open the stall the trio is hiding in, but he isn't looking in their direction; the door closes again before he can notice them)'' WHY ARE YOU STILL HERE?! COME ON! GO! MOVE! NOW!\\
'''Fungus:''' ''(as Randall chases him out of the bathroom)'' No, I'm not here! I'm going right now!...\\
'''Sulley:''' ''[-They're gone.-]''\\
(''A huge splash is seen in the stall Sulley, Mike, and Boo are hiding in'')\\
'''Boo:''' Ew.
** Later, Sulley hides underneath a table on the Scare Floor, and Randall materializes right beside him, but is looking the other way so Randall can't see him, and the bell rings before Randall can notice him.
* MistakenForGay: Sulley and Mike several times, but it is kept rather subtle.
* TheMole:
** Both Randall and Waternoose. Before TheReveal showing how grossly vile Mr. Waternoose became, the former is only depicted as cocky and mean, thus less surprising than the latter Mole.
** [[ChekhovsGunman Roz]] is working for the CDA as #1.
* MonsterCloset: Technically, the closets aren't hidden, but it is impossible to tell from the outside when one of them's gonna open and reveal a monster.
* MonsterFacade: Doing this is the job of all the Scarers: they need to pretend to be vicious and scary because the screams of terrified children are their main source of energy.
* MoodWhiplash: When Sulley is fighting Randall, it is funny since Randall is invisible. But when Randall starts to [[NightmareFuel strangle]] Sulley, the mood gets a bit serious.
* MotiveMisidentification: Mike thinks Randall's behavior and motivation is all about breaking the scare record up until he flat out tells him it is not.
* MotiveRant: Waternoose provides this during his AccidentalPublicConfession in front of the CDA in the simulation room.
* MultiArmedAndDangerous: Randall (four arms and legs), the four-armed and six-armed CDA agents, and Rivera (six tentacle arms and five legs).
* MultiArmedMultitasking: The sushi chef.
* MultipleHeadCase:
** Very briefly seen, after Sulley and Mike expose [[BigBadDuumvirate Randall and Mr. Waternoose]]'s plan to [[TheMenInBlack the CDA]]. A two-headed monster can be seen, the two heads exchanging glances with each other.
** Also, Roz is seen reading a newspaper headlined, ''"Baby born with 5 heads, parents thrilled."''
* MyGodWhatHaveIDone: Sulley is ''deeply'' shaken when he sees the effect that his scaring demonstration has on Boo, and by extension the effect his scaring has on human children in general.
-->'''Sulley:''' Did you see the way she ''looked'' at me?
* MysteriousMiddleInitial: It is not revealed what Sulley's middle initial of P stands for.
* NecessarilyEvil: Despite being the BigBad of the movie, Waternoose makes it clear that he wished he didn't have to resort to such measures, but felt that he had no choice and that his child-kidnapping conspiracy is this. Everyone else disagrees.
* NestedMouths: In Harryhausen's, one of the monsters has a second monster for a tongue, which eats the food.
* NeverFilledOutOfficialPaperwork: A variation. Mike Wazowski frequently forgets to file his paperwork, and after news that a child got loose from the Monster's Inc. scream processing facility, Mike goes to Roz, who's in charge of the doors going into children's rooms, to find the door Randall was working in, to put Boo, the child in question, back. Roz informs Mike he didn't file his scare reports again, ignores his request, and closes the window to her office on him. Specifically, Mike didn't file the paperwork because he was late for a date with Celia and Sulley offered to file it for him, but then Sulley got scared by Boo and forgot about the paperwork.
* TheNewRockAndRoll: {{Downplayed}}. It is implied that the increasing explicitness of human media is making kids harder to scare and contributing to the energy shortage in the monster world; however this remains as merely an undertone and the film never gets preachy or {{Anvilicious}} about it.
* NiceJobBreakingItHero:
** Sulley throws a teddy bear that looks like Mike at Boo so that she would quiet down and stop laughing and running around, but then Mike angrily snatches it away from her asserting it is his. Guess how Boo reacts.
** Sulley attempts to tell Waternoose of what Randall tried to do, but it turns out they've been conspiring together and sends him and Mike to the Himalayas. [[WhatTheHellHero Mike calls him out on that]].
** Just barely subverted in the ending: Though Sulley and Mike ultimately manage to get Boo back into her bedroom, and expose Waternoose of his crimes, their actions also caused the company to nearly be shut down and almost caused a permanent city-wide blackout as a consequence. The only reason it did not turn out that way was because it was discovered that the children's laughter had 10x the power output of scream. In addition, the Scarers seem well-adjusted to the Laughter switch.
* NoHoldsBarredBeatdown: Randall delivers one to Sulley while invisible so Sulley can't fight back. Mike doesn't realize Sulley's being beaten up because he can't see Randall.
* NonMammalianHair:
** Roz (a.k.a. CDA Agent #1)is a large slug-like monster with a tuft of white hair on her head.
** Also, some of the monsters, whether resembling toads, slugs or octopodes, will inevitably have some form of hair on their heads.
* NoPeekingRequest: At the end of the film, Mike does this with Sulley when he's about to surprise him with Boo's reconstructed door.
* NotAfraidOfYouAnymore: Boo to Randall, right after beating the crud out of him to save Sulley.
* NotSoInnocentWhistle: After George forcibly stops his assistant from calling yet another 2319, George walks away whistling smugly.
[[/folder]]

[[folder:Tropes O-P]]
%% Administrivia/ZeroContextExample entries are not allowed on wiki pages. All such entries have been commented out. Add context to the entries before uncommenting them.* OddCouple: Sulley and Mike. See also OppositesAttract, below.
%% Administrivia/ZeroContextExample entries are not allowed on wiki pages. All such entries have been commented out. Add context to the entries before uncommenting them.* OffscreenTeleportation: Boo does it several times.
* OhCrap:
** Mike during the line from Roz. "And I'm ''sure'' you filed your paperwork correctly. ''For once.'' ''[beat, Mike's eye widens]'' Your stunned silence is ''[[SarcasmMode very]]'' reassuring."
** Sulley when he tries to return Boo to her room, only for the door handle to turn - revealing someone's already inside - before he can open it.
** Sulley and Mike as they escape Harryhausen's only for them to realize that the CDA has used the 835 to decontaminate the restaurant.
** Sulley and Mike entering the factory with Boo, only to find the lobby swarming with CDA agents. Another one follows moments later when they see Boo heading towards Waternoose.
** Mike upon hearing Celia's furious voice [[FullNameUltimatum shouting his name]] and seeing her stride towards him with [[ConeOfShame cones]] around her neck, as well as those on her snakes.
** Sulley when he sees Needleman and Smitty dump the trash (that Sulley thinks has Boo in it) down a chute that leads to the trash compactor.
** Sulley and Mike get one after Waternoose's WhamLine, as they realize they're about to be banished.
** Also Randall, after Sulley and Boo turn the tables on him and Sulley makes it very clear he is about to get his comeuppance.
** Also Waternoose, when he tries to snatch Boo from her bed, [[EngineeredPublicConfession only to discover he has snatched the simulated child in the simulation room, and the CDA has recorded every word he has said.]]
* OhNoNotAgain: When Randall gets trapped in the human world he is mistaken for an alligator. The humans' dialogue implies that he is not the first "gator" to appear in the home.
-->'''Boy:''' Mama! Another gator got in the house.\\
'''Mama:''' ''Another'' gator?! Gimme dat shovel!
* OppositesAttract: Sulley and Mike.
* OurMonstersAreWeird: The monster world's denizens come in all shapes, sizes, and colors, but there is some general consistency. All of them are brightly colored and cartoonishly designed. They also tend to generally resemble members of families in the animal kingdom, such as mammals (Sulley, George, the Abominable Snowman), anthropods (Waternoose), reptiles (Randall and Ms. Flint), cephalopods (Charlie and a bunch of background monsters), and gastropods (Roz, Smitty, and a bunch of background monsters). Even then, there are some exceptions: Mike and Fungus are more alienlike, whereas Celia, Needleman, and Jerry are more humanoid.
** There is even a monster who has removable eyes!
* OverreactingAirportSecurity: The CDA's response to a 2319 alarm leaves George humiliated.
* PackedHero: Parodied. Boo loses one of the "eyestalks" of her monster costume in a trash can. Sulley sees it and thinks she is in a pile of garbage, then watches the garbage get swept into a cart, dropped down a chute, and put through an exceedingly brutal compactor. The audience sees her walk away from the garbage can; Sulley faints at every step of the compactor.
* PapaWolf: Sulley to Boo.
* PaperThinDisguise: Boo's monster outfit, to an extent, considering her head is looking out through the mouth.
* PeekABogeyman: Sulley, upon noticing Boo make a drawing of Randall, assures her that Randall isn't coming through the closet by opening the closet door to reveal nothing in there. In the outtakes, Roz is shown to be there, and she says "Guess who?"
* PigLatin: "Ook-lay in the ag-bay." {{Lampshade|Hanging}}d in the HilariousOuttakes:
-->'''Sulley:''' Look-lay in the bag-bay.\\
'''Mike:''' I think you mean, "Ook-lay in the ag-bay."\\
'''Sulley:''' What? Didn't I, uh...?\\
'''Mike:''' Well, you know, maybe you should just take a minute and ead-ray your ipt-scray!
* PlotMandatedFriendshipFailure: After being banished to the Himalayas, Mike finally lets Sulley have it for dragging him into the entire Boo debacle and essentially ruining his life, causing a fight that would have turned violent had the Abominable Snowman not found them. When Sulley leaves to rescue Boo, Mike refuses to join him, though [[ChangedMyMindKid he comes around]] a few minutes later.
* PluckyComicRelief: Mike, and Boo to a lesser extent.
* PortalDoor: Probably one of the more iconic examples in fiction. The titular factory has a massive warehouse full of doors which become these when powered, allowing monsters to go into kids' rooms to scare them to collect scream. When the doors are not on power, those in the monster world open to nothing on the other end, and the closets in the human world open as normal, especially when said doors in the monster world have been destroyed.
* PottyDance: Boo does it at one point in the movie. At first, Sulley and Mike think she was dancing with joy, but Sulley quickly realized its true meaning.
* PoweredByAForsakenChild: [[BigBad Waternoose]] and Randall's plan to solve the power shortage. Since it's getting harder and harder to scare kids in the usual way, Randall constructs a "scream extractor" that will suck the very screams from a child's lungs--meaning that they'll be ''kidnapping children'' to get fuel.
* PreAsskickingOneLiner: A furious Mike to Sulley after they are banished: "YOU'RE STILL NOT LISTENING?!" Immediately after, he screams with rage and dives at Sulley.
* ProductionForeshadowing: [[WesternAnimation/FindingNemo Nemo]] appears as a clown fish on the wall in Harryhausen's, is seen on the wall in the trailer Randall gets banished to, and a Nemo toy is seen among the toys in Boo's room.
* ProperlyParanoid: When Sulley and Mike run to find Boo's door waiting for them on the Scare Floor, and Sulley finds out Randall put it there, he becomes immediately cautious, and Boo [[ImminentDangerClue is suddenly terrified and hides under a desk]]. He says that something feels wrong about all this and refuses to let Boo through the door. Mike goes inside to assure him it is perfectly safe... and then gets stuffed into a box by Randall, who was waiting inside to trap Boo.
* ProsceniumReveal: The film opens with a monster walking into a child's bedroom. He is freaked out when the child starts screaming and starts knocking things over -- and then suddenly the lights turn on, an alarm goes off, and the voice "Simulation Terminated!" is heard repeatedly. One wall of the room lifts up, revealing that the child is actually a robot, and we are actually in Monsters, Inc.'s state-of-the-art children's room training simulator, being observed by an instructor and several other students, who start critiquing him about his mistakes.
* PunchClockVillain:
** It turns out that monsters scare children because screams are their source of electricity. Off-duty, they're pretty nice people.
--->'''Sulley:''' (''to Boo'') I'm not going to scare you. I'm off duty!
** Also, Fungus is this as Randall's partner
--->'''Fungus:''' I'm sorry, Wazowski, but Randall said I'm not allowed to fraternize with victims of his evil plot.
* PunctuatedForEmphasis: Randall is especially guilty, and also, to a lesser degree, Mike.
* PyrrhicVictory: Sulley and Mike manage to foil Waternoose's extreme plan to save Monsters, Inc., by enslaving children, and get him arrested for it, but as he is taken away, Waternoose warns that their actions means that Monsters, Inc., will be shut down and doom all of Monstropolis to a state of perpetual blackout. Fortunately, Sulley manages to subvert it by taking control of the company and switching over to collecting laughter instead of scream, solving Monstropolis's energy crisis.
[[/folder]]

[[folder:Tropes Q-R]]
* RageBreakingPoint: After Sulley and Mike are banished, Mike tells Sulley that all he had to do was listen to him about what he thought was going on. Then he realizes that he wasn't listening to him, and still isn't, crosses this, screams with rage and dives at Sulley, knocking the two of them down a snowdrift, and leaving both poised to punch at the other before Mike sees the Abominable Snowman behind Sulley.
* RapidFireNo: Sulley lets one off after Waternoose kidnaps Boo and banishes him and Mike to the Himalayas.
* RealFakeDoor: Any time a door opens to nothing, especially when Sulley and Mike are exiled to the Himalayas. Moreover, the closets in the human world open as normal.
* RedemptionRejection: During the final confrontation, Sulley attempts to reason with Waternoose and talk him out of his plans to kidnap children. Waternoose refuses, first by backhanding Sulley across the room, then by attempting to attack Boo.
* RefugeInAudacity: Mike pulls this twice with BlatantLies both of which surprisingly work.
** He first tells Waternoose that a disguised Boo is present at work due to it being "Bring An Obscure Relative To Work" Day. Justified due to having to think on the fly. It works, as Waternoose is so busy with the energy crisis that he assumes he missed the memo.
** He does it again on the Scare Floor when everyone turns to look at him and Sulley, telling them they're rehearsing a scene for the upcoming company play. That also works. Bonus points when, in the outtakes, the play actually gets made.
* ReminderFailure:
** Mike has Post-it notes inside his locker, reminding him to file his paperwork. He ''still'' keeps forgetting to file it.
** A {{subverted|Trope}} example occurs when Sulley tries repeating to himself where he should deliver Mike's paperwork. He corrects his own [[RepeatedRehearsalFailure verbalized mistake]] on which colored copies go where, but he never actually gets around to delivering them, forgetting because the human child Boo gets out.
* RepeatCut: When the door on which Sulley, Mike, and Boo are riding hurtles down a steep slope. In the first shot, you see them travelling down most of slope from behind, then you see a shot of them from the front, followed by a POV shot. But judging by the first shot, it takes them a rather long time to go down the last part of the slope, meaning that the camera must have jumped back a second in time.
* RepeatedRehearsalFailure: Sulley tries repeating to himself where he should deliver Mike's paperwork. He messes up, then subverts the trope by correcting his mistake.
-->'''Mike:''' The pink copies go to accounting, the fuchsia ones go to purchasing, the goldenrod ones go to Roz. Leave the puce.\\
''[One SmashCut later]''\\
'''Sulley:''' Pink copies go to accounting, fuchsia ones go to Roz. ''[{{Beat}}]'' [[SubvertedTrope No]], the fuchsia ones go to ''purchasing'', the ''goldenrod'' ones go to Roz. Man, I have no idea what puce is. ''[He looks at the colors]'' Oh, ''that's'' puce.
* ReptilesAreAbhorrent: While there are many other reptilian / dinosaurian monsters that aren't villainous in the slightest, Randall is the most obviously reptilian-looking and "serpentine" of them all.
* TheReveal:
** Waternoose isn’t exactly a HonestCorporateExecutive - he is the BigBad.
** CDA agent #1 is Roz.
* RewatchBonus: The scene where Sulley accidentally scares Boo has Mike in the background trying to convince Mr. Waternoose that Boo isn't toxic. Waternoose's reactions during that scene include a cartoonish gasp and pantomime raising of hands when he first sees her, a calculating shiftiness of his eyes once Mike starts talking, being so willing to discard a lifetime of teaching during the course of a minute-long speech from Mike that he willingly picks Boo up (which Mike is still hesitant to do after a full day in her company), a different sort of anger during his "how could this happen?" question than would be expected from someone who's just been told a murderous psychopath is using his factory to kidnap children, and asking who else knows about Boo. Assuming the viewer wasn't distracted by the heartbreaking way Boo cowers away from Sulley, it would be implausible for even the most ReasonableAuthorityFigure to react as calmly as Waternoose does. Rewatching the scene after discovering that he is behind the whole scheme makes all the subtleties of his reaction make perfect sense.
** When the CDA first comes bursting into the factory, there's a seemingly-random shot of Roz slamming down the window of her cubicle as they rush by her. This makes a lot more sense when you discover that she's TheMole for the group on an undercover investigation--presumably, she wanted to ensure that no one would look at or talk to her during their raid so her cover would remain intact.
* RunningGag:
** Mike repeatedly failing to file his paperwork.
** Mike is always being cut somehow from images and videos he appears in (in the [[https://www.youtube.com/watch?v=Cjq-9sdcY0U Monsters, Inc. commercial]] at the beginning, the M in the "Monsters Inc." corporate logo is hiding him) -- and ''doesn't care'' because he did at least get a bit of the spotlight.
** It is more implied that he got slipped the [[IdiotBall idiot pill]] and didn't notice.
--->'''Mike:''' I can't believe it! I'm... ''on the cover of a magazine!''
** The original DVD has a picture of Sulley and Mike -- with Mike largely obscured by the hole.
** "23-19! We have a 23-19!" Poor [[TheChewToy George]]. He finally wises up enough to pass off the sock to his assistant before he can make a [[TheMenInBlack 2319 call]].
** [[HilariousOuttakes Roz is quite the practical joker.]]
--->'''Roz:''' Guess who?
[[/folder]]

[[folder:Tropes S-T]]
* SarcasticWellWishing: When [[TheManBehindTheMan Waternoose]]'s [[WellIntentionedExtremist plan to save the company (and thus all of Monstropolis) by enslaving children for their screams]] is exposed for all to see, he is arrested for his attempted crime, [[VillainousBreakdown but not without]] [[WhatTheHellHero telling Sulley off]]:
-->'''Waternoose:''' I hope you're happy, Sullivan. You've destroyed this company! Monsters Incorporated is dead! Where will everyone get their scream now?! The energy crisis will only get worse -- ''because of YOU!!''
* SayMyName: Sulley yells "BOO!" after he and Mike are banished to the Himalayas when he opens the banishment door and sees only snow behind it.
* SceneryPorn:
** The closet door storage chamber is this in a "Holy sh**, this is great!" way.
** All of the doors Sulley and Mike run through during the Randall chase scene. Because the filmmakers just ''[[SarcasmMode happened]]'' to need backgrounds of Hawaii, Japan and Paris, right?
* ScoobyDoobyDoors: The final Randall chase is a stunning example. Contrary to most uses of the trope though, this is entirely justified in-universe because of the nature of the doors.
* ScoobyStack: [[https://static.wikia.nocookie.net/pixar/images/2/22/Monsters_inc_ver4.jpg/revision/latest?cb=20110515133310 This Japanese poster]] and the 2009/3D Blu-ray cover show Sulley, Randall, Roz, Celia, and Mike poking their heads through Boo's door. The 2002 VHS and DVD covers have a {{downplayed|Trope}} version with just Sulley and Mike.
* ScrewTheRulesIHaveConnections: A lighthearted example. When Mike tells Celia that he is taking her to Harryhausen's, a super-trendy sushi restaurant, for her birthday, she says that "it's impossible to get a reservation there." It is later revealed that Sulley used his pull as the city's top scarer to book Mike a table.
* SearchingTheStalls: Sulley and Boo hide from Randall in a toilet stall. He punches the stalls open one by one, and Sulley flinches as every door opens. Randall actually slams open the stall Sulley is hiding in, but isn't looking at the time. Momentum closes the door before Randall sees them.
* SecondPlaceIsForLosers: Randall certainly seems to think so and is second-place scarer to Sulley for a while.
* ShackleSeatTrap: Randall uses a contraption called a "scream extractor" which has automatic wrist straps that hold a victim in the seat while a plunger-looking device attaches itself to their face to suction and capture sound as they scream.
* ShooOutTheClowns:
** A brief moment of this happens after Sulley and Mike are banished. During a tense moment for Sulley and Mike during their argument, the Abominable Snowman awkwardly excuses himself to leave the cave and make more snow cones, as Mike had just thrown them all at Sulley in his anger.
** Mike is absent when Randall is about to knock Sulley to his death during the door chase and only returns after Boo saves Sulley by delivering a NoHoldsBarredBeatdown.
* ShortScreentimeForReality: Monstropolis is a massive, sprawling city populated with monsters, while the most we see of our world consists of several children's bedrooms, a single beach, and a snowy mountain.
* ShoutOut: See [[ShoutOut/MonstersInc here]].
* ShovelStrike: Randall's fate. He is banished to a trailer in the bayou where a RaginCajun repeatedly whacks him with a shovel, mistaking him for a gator.
* ShutUpAndSaveMe: Sulley is being wailed on by Randall, who is invisible at the time. Mike shows up, can't see him, and doesn't even notice that Sulley is in danger while he tries to apologize for refusing to help him save Boo. [[AccidentalHero Sulley is saved when Mike unintentionally unveils Randall's position while getting upset at Sulley for "ignoring" him.]]
-->'''Mike:''' Hey look, it's Randall. It's... ''ohhhhh''.
* SickeninglySweethearts: Mike and Celia.
-->'''Mike:''' Schmoopsy-poo!\\
'''Celia:''' Googly-bear!
* {{Sidekick}}: Mike views Sulley as his {{sidekick}}, but everyone else can see that Mike is obviously Sulley's.
* SinisterSuffocation: Randall intends to kidnap countless human children across the globe and subject them to a machine that forces them to scream uncontrollably, leading to death by suffocation. Mike is clearly terrified when Randall tries to use him as a test subject, while Sulley goes on a RoaringRampageOfRevenge when the villain attempts to use the device on a human girl he had befriended.
* SlippingIntoStink: While hiding in a bathroom stall and standing on a toilet, Mike Wazowski's foot accidentally dips into the water, causing him to pull it out. However, he cannot hold his balance for long, and eventually slips and falls completely into the toilet with a huge splash.
* SmugSnake: Randall.
* SneezeOfDoom: PlayedForLaughs during Sulley and Mike's commute to work -- a monster reading a newspaper sneezes fire on it, destroying it before he could finish reading. He grumbles "Aw, nuts!"
* SpannerInTheWorks:
** Mike manages to get the ball rolling on uncovering Waternoose's conspiracy by ''forgetting his paperwork''. Because he forgot and had a date that night, he sent Sulley in his place, meaning that Sulley was in the right place to discover Boo's door, which leads to her entering Monstropolis.
** Roz/CDA Agent 1 comments that her two and a half years of working undercover almost went belly up when Sulley got to Boo before Randall. She then admits that without Sulley and Mike's help, she never would've learned Waternoose was the head of the conspiracy.
* SpecialPersonNormalName: Everyone who works for Monsters, Inc. has a plain name like "James P. Sullivan" or "Mike Wazowski", which helps to reinforce their characterization as average, working-class Joes.
* TheStarscream: After Waternoose tells Randall to leave no witnesses, Randall replies in a manner that lets the audience know that he is planning to backstab his own boss when this is all over.
* StatingTheSimpleSolution: When Mike is trying to come up with a plan to get rid of Boo, from using a giant slingshot to digging a tunnel (with spoons) and releasing her into the wild, Sulley offers up the idea of putting her back in her door so it would be like none of it ever happened and everything would be back to normal. While a smart idea, it turns out to be anything but simple.
* StealthPun:
** When Celia's Medusa-like hair keeps kissing Mike, she says, "Michael, you're such a charmer." A snake charmer.
** Near the beginning, we see a gigantic scaly monster crossing the road. He makes the sounds of a chicken.
** The company's name is Monsters, Inc., but is sometimes referred to by its initials, "M.I." Their logo is an M with an eye on it.
* StumbledIntoThePlot: Sullivan happened to run into Randall doing some "after-hours screaming" during break and kicked off most of the rest of the movie.
* StylisticSuck: Yes, Mike actually ''did'' make "Put that Thing Back Where it Came From or So Help Me" into [[HilariousOuttakes a musical]], complete with mediocre acting/choreography, clumsily-set up backgrounds, and [[ArsonMurderAndJaywalking the CDA as ushers]]. The audience loved it; the critics (of the Monster World) did not. [[FridgeBrilliance It was probably made in a hurry by the CDA to back Sulley and Mike's alibis as part of their cover-up]].
* SuddenlyShouting:
** Mike. At least three times.
--->'''Mike:''' ...lie in bed, sleep in, or simply, ''WORK OUT THAT FLAB THAT'S HANGING OVER THE BED! GET UP, SULLEY!''\\\
'''Mike:''' Well, then why don't you find someplace for it to sleep...''WHILE I THINK OF A PLAN!''\\\
'''Mike:''' I always wanted a pet ''THAT COULD KILL ME!''\\\
'''Mike:''' Once you name it, you start getting attached to it! ''NOW PUT THAT THING BACK WHERE IT CAME FROM, OR SO HELP ME...!''
** Randall also frequently does this.
--->'''Randall''' (''to Fungus''): If I don't see a new door in my station in 5 seconds, I will personally put you '''''THROUGH THE SHREDDER!!!'''''
%%* SuperStrength: Sulley.
* SureLetsGoWithThat: A subtle example but when Randall corners Mike and is accused of cheating he initially acts outraged before suddenly [[VerbalBackspace calming down and no longer protesting the point]] before offering to help get Boo back to the human world. As we later see, it is meant to be foreshadowing that the real reason he was after Boo was in order to use her to test the Scream Extractor.
* SurprisinglyCreepyMoment: The scene where Randall angrily searches the toilet cubicles for the source of a noise he heard is quite intense, considering he nearly caught the tritagonists.
* SurprisinglyHappyEnding: The movie seems like it is about to have a BittersweetEnding in the form of Sulley having to part ways with Boo, but it turns out that Mike Wazowski recreated the door that leads to her room, so Sulley can at least still visit her.
* SurprisinglyRealisticOutcome: Waternoose may be a BenevolentBoss, and Monsters, Inc. may be his family's company, but he's still beholden to his shareholders. [=CEOs=] aren't inherently all-powerful, and the factory doing badly means ''his'' head is on the chopping block. It's most notable when Sulley tries to lift Waternoose's spirits with a pep talk, only for the boss to mutter "Tell that to the board of directors"--they're the ones who have power in a corporation, not just the chief.
* TaeKwonDoor: Mike slams a door on Randall during their fight to the tune of "I hope that hurt, lizard boy!".
* TakeAThirdOption: Sulley, upon gaining control of the company, had only two options of what do to with it. He could have made the workers continue scaring kids for energy, or left the company to fall, causing Monstropolis to lose all power. He takes a third option that he discovered upon first finding Boo (reminded by the last word of Mike's pep-talk): He opts to make children laugh instead, which produces more power than screams of terror did.
%%* TakeMyHand: Sulley to Mike.
* TakeYourChildToWorkDayPlot: [[ExploitedTrope Exploited]] when Sulley and Mike try to return Boo to the human world by disguising her as a monster and sneaking her into the company headquarters. When Waternoose wonders who the cute kid is, Sulley says she is actually his "cousin's sister's daughter", and then claims today is Bring An Obscure Relative To Work Day.
* TeamPowerWalk:
** The scarers dramatically enter the power company floor while slowly walking towards the screen in v-formation. A ShoutOut to ''Film/TheRightStuff''.
** {{Parodied|Trope}} in the HilariousOuttakes segment where Sulley (in front) trips, and the monsters behind him trip, [[DisasterDominoes and the monsters behind them...]] If you look closely, you can actually see a tentacle from the monster behind him getting caught up around his feet which is why he trips.
* TemptingFate:
** After Boo sends everyone at Harryhausen's into a panic, Mike tells Sulley while they flee, "Well, I don't think ''that'' date could have gone any worse." Cue the CDA initiating an 835 on the restaurant and an OhCrap reaction from Sulley and Mike.
** After Boo knocks over Mike's stack of [=CDs=], he notes that "As long as it doesn't come near us, we're gonna be okay." Boo then sneezes on him, causing Mike to [[EyeScream spray his eye with disinfectant]].
** Sulley to Mike when sneaking Boo into the factory: "Everything's going to be OK." Cue an OhCrap immediately afterwards when they find the lobby swarming with CDA agents.
* TerminallyDependentSociety: Implied throughout the film. A major background problem is that kids are harder to scare these days, which is leading to a scream shortage in monster-world where the energy given from screams powers pretty much everything. This is fixed at the end of the movie where making kids laugh becomes the new source of energy.
* ThatCameOutWrong: At Harryhausen's, Mike's telling Celia what he told someone else when asked who he thought he would spend the rest of his life with. He is about to say "you", when Sullivan stumbles by outside and Mike accidentally finishes the statement with a surprised "Sulley!?".
* TheyKnowTooMuch: Mr. Waternoose states this trope after Sulley asks Mr. Waternoose to let Boo go, due to their knowledge of his conspiracy.
* ThingsThatGoBumpInTheNight: A PerspectiveFlip, showing that said things are actually more scared of ''us''.
* ThisIsGonnaSuck:
** George in the locker room when he opens the door to his locker and the [[BrickJoke toys Sulley shoved in there]] fall on him, seconds before CDA agents pounce on him.
--->'''Charlie:''' 2319! We have a 2319!\\
'''George:''' (''groaning resignedly'') Oh, dear.\\
'''CDA Agents:''' Get him! (''[[DogPileOfDoom they bowl George over]]'')
** At one point, Mike needs Boo to laugh. He whimpers before pulling his eyelid and snapping it like an elastic band against his eyeball.
* ThisIsNoTimeToPanic: Inverted. After the first sighting of Boo, a professorial-looking monster appears on TV, seemingly to calm people down. He then tells the audience, "It is my professional opinion that now is the time to [[SuddenlyShouting PANIC!]]"
* ThoseTwoGuys: Needleman and Smitty, two employees who spend their screen time bumbling around with one another.
* ToiletHumor: The snowcone scene:
-->'''Yeti:''' (''holding up balls of YellowSnow'') Snow cone?\\
'''Mike:''' Yuck.\\
'''Yeti:''' No no no, don't worry. It's lemon.
* ToiletPaperTrail: Mike Wazowski ends up with a piece of toilet paper stuck to his foot after he and Sulley have come out from hiding in the bathroom from Randall. [[NoFlowInCGI That was one of the hardest things for the animation team to render]].
* TorchesAndPitchforks: {{Discussed|Trope}} by Mike when he lists the consequences of everything that happened in the end.
-->'''Mike:''' Not to mention the angry mob that'll come after us when there's no more power...
* TrappedInAnotherWorld: Sulley and Mike get banished to the human world by Waternoose and Randall late in the movie. They later [[HoistByHisOwnPetard inflict this fate]] on Randall by throwing him through a door and shutting it off.
* TrappedTheWrongTarget: Mike is threatened by Randall to return Boo to her room during lunch break. When Sulley hears of this, he refuses to let Boo go back to her room, knowing full well that Randall is planning something, so Mike goes inside the room and starts jumping on Boo's bed to prove that it isn't a trap. As it turns out, it actually was a trap, and Randall ends up capturing Mike instead.
* TravelingAtTheSpeedOfPlot: The Abominable Snowman tells Sulley the village is a three-day hike from where they are on the mountain. Three days of hiking does not become thirty seconds just because you are on a sled, but Sulley and Mike can't arrive too late to save Boo.
[[/folder]]

[[folder:Tropes U-Z]]
* UnstoppableRage: Sulley, Mike, and Boo. Sulley when he releases Boo from the scream extractor, Mike when he and Sulley are banished, and finally Boo in the door vault when she attacks Randall and in doing so saves Sulley.
-->'''Mike:''' YOU'RE STILL NOT LISTENING?! (''screams with rage and dives at Sulley'')
* VerbalBackspace: When Mike accuses Randall of cheating the system to boost his numbers, Randall's reaction almost gives away his deeper intentions, before he corrects himself.
--> '''Randall:''' CHEATING?! I-- ... ''Cheating''. Right.
* VertebrateWithExtraLimbs: Several monsters, but most notably:
** Randall, who has four arms and four legs despite looking like a snake-chameleon hybrid.
** Mr. Waternoose, who has six legs, although his case is more justified considering his design is based on the multi-legged spiders and crabs.
** Celia, who is humanoid and has five legs.
** Smitty, who looks like a slug and has four arms.
** Several CDA agents, who are mostly four-armed if they have extra limbs, but one type of agent has six arms.
** Bile, who has four arms and looks like a [[BuffySpeak humanoid, repitilian, blob...thing.]]
** Charlie, George's assistant, has five legs, but like Waternoose, it is more justified because he looks like a cephalopod.
* VillainousBreakdown:
** Randall flies into a borderline psychosis and tries to murder Sulley because Mr. Waternoose all but tells him he'll never live up to Sulley, no matter what he does or how hard he tries.
** At the film's (second) climax, Waternoose himself throws a fit of temper tantrum, straight out yelling to Sulley that he'll kidnap a thousand children before letting his company die. He was about to throw another one immediately, but he can't do much while the CDA escort him out for his crimes. But the second tantrum does take its toll on Sulley's emotions when Waternoose [[WhatTheHellHero calls him out]] for [[NiceJobBreakingItHero the company's demise and ruining any chances Monstropolis has of recovering from the energy crisis]]. However, Sulley does figure out a way to make the company even better.
* WeNeedADistraction: When Randall chases Sulley and Mike through the scare floor to prevent them from revealing Waternoose's plan, Celia announces on the intercom that Randall just broke Sulley's scare record, prompting the other monsters on the floor to mob him with congratulations, allowing Sulley and Mike to make their escape.
-->'''Celia:''' Go get 'em, Googly-Bear.
* WeWereRehearsingAPlay: While arguing about what to do with Boo, Mike ends up yelling at Sulley in the middle of the Scare Floor gathering the attention of all the workers. Mike covered up the outburst by claiming that they were rehearsing for a play, and then attempt to break into song. In an after credits sequence, it is revealed that they really did turn the excuse into a musical.
* WellIntentionedExtremist: Mr. Waternoose: "I'll kidnap a ''thousand'' children before I let this company die! And I'll silence ''anyone'' who gets in my way!"
* WhamLine:
** Throughout the first half of the film, Mike and Sulley think that Randall is cheating, trying to break the all-time scare record. So when Randall finds out that he kidnapped Mike instead of Boo:
-->'''Randall:''' WAZOWSKI?! Where is she, you little one-eyed creh-tin?! [[note]]He meant "cretin".[[/note]]\\
'''Mike:''' [[WrongInsultOffence Okay, first of all it's "cree-tin".]] If you're gonna threaten me, [[DoWrongRight do it properly]]. Second of all, you're nuts if you think kidnapping ''me'' is gonna help YOU cheat your way to the top!\\
'''Randall:''' ''[EvilLaugh]'' [[WhamLine You still think this is about that stupid scare record?]]\\
'''Mike:''' ''[Faltering]'' Well... I did. Right up until... you chuckled like that. And now I'm thinking I should just get out of here.
** How Waternoose's duplicity is revealed.
-->'''Mike:''' Sir, that's not her door...\\
'''Waternoose:''' I know, I know. (''Cue Randall appearing and opening the door.'') It's ''yours''. (''Cue an OhCrap from Sulley and Mike''.)
* WhatTheHellHero:
** Sulley briefly calls out Mike for making a deal with [[TheRival Randall]], knowing the latter is Boo's assigned scarer and likely wants her for malicious purposes. He turns out to be correct when Mike walks into Boo's room and gets taken by Randall.
--->'''Sulley:''' Mike, what are you thinking? We can't trust Randall. He's after Boo.
** After their exile to the Himalayas, Mike tells Sulley that he should have listened to him instead of reporting the situation regarding Boo to Waternoose.
** A downplayed example occurs at the end of the film. Mr. Waternoose points out that Sulley's efforts to reveal his corruption will not only cause Monsters, Inc. to shut down, but also aggravate the energy crisis. Luckily, Sulley figures out a solution not long after.
* WhyDidItHaveToBeSnakes: Boo is remarkably sanguine about finding herself in a world full of monsters, but she is absolutely terrified of Randall, her scarer. Her [[FreezeFrameBonus file]] indicates she actually is afraid of snakes.
* WrongGenreSavvy: Mike, throughout the movie, as he always thinks he is the star and Sulley is his sidekick. Taken to its logical extreme in the "Company Play" bonus scene.
* WrongInsultOffence:
-->'''Randall:''' Wazowski! Where's the kid, you little one-eyed cretin?\\
'''Mike:''' First of all, it's pronounced cree-tin. If you're going to threaten me, do it properly.
* WroteAGoodFakeStory: While arguing over returning Boo to her world, Mike yells at Sulley, "Put that thing back where it came from or so help me—" before realizing other monsters are listening, and gamely tries to pass it off as them rehearsing a musical. During the end credits, we see the premiere of the new musical ''Put That Thing Back Where It Came From Or So Help Me.''
* WoodChipperOfDoom: A non-lethal version in Monsters, Inc.: child-contaminated doors are fed into a chipper; Sulley is heartbroken when this happens to Boo's door at the end, though it is eventually restored afterwards. Randall, at one point, threatens to feed his assistant Fungus into it out of frustration.
* XDaysSince: The scare factory has a sign counting the days since the last accident.
* YellowSnow: The Abominable Snowman propose some lemon snow cone to Sulley and Mike which are implied to be this trope, Mike even seems disgusted by them and the Abominable Snowman have to insist that it is really lemon.
* YouHaveOutlivedYourUsefulness: In a satirical fashion Sulley tells Randall because Boo isn't afraid of him anymore, his career as a scarer is over.
* YouSayTomato: When Randall first captured Mike and placed him in the Scream Extractor's chair, Randall proceeds to call him a "one-eyed cretin" with a short e. Mike proceeds to correct him by saying cretin with a long e and remarking if you are going to threaten me, do it properly.
* YouKillItYouBoughtIt: A non-fatal example occurs at the end of the film when Sulley unintentionally does away with Waternoose, the old establishment, and heading the company, remakes Monsters Inc. to seek children's laughter instead of fright for power. The energy crisis is averted.
[[/folder]]

[[folder:Tropes Specific to Promotional Material]]
* BewareOfViciousDog: Mike encountered one before Sulley helped him return to Monstropolis.
* CanonDiscontinuity: Sulley asked Mike if they remember going to the fifth grade. They haven't been to the fifth grade together.
* EarlyInstallmentWeirdness: The teaser, by dint of being produced before the movie itself, has several moments that don't gel with ideas established in the finished movie:
** Sulley and Mike go inside the kid's bedroom together. In the movie, only Sulley goes in while Mike stays outside to maintain canisters and bring in doors.
** Mike casually picks up a hula hoop with nothing suggesting fear of it. In the movie, monsters (Mike included) are terrified of touching objects children have touched under the belief they're toxic to them.
** Sulley and Mike mention attending the fifth grade together, when ''WesternAnimation/MonstersUniversity'' {{retcon}}ned it so they first met in university instead. Sulley also states that he was the studious one and Mike was the one who slacked off in class, when it is the exact opposite in the movie.
* HowIsThatEvenPossible: In the charades trailer, Sulley correctly guessed Mike's charade quickly and Mike asked Sulley "How did you do that?"
* {{Narrator}}: James Coburn (the voice of Mr. Waternoose) narrates the teaser.
* OhCrap: Mike looks absolutely terrified after hearing the [[BewareOfViciousDog growl of an angry dog]]
[[/folder]]
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-->''[[Music/RandyNewman ♫ I wouldn't have nothing if I didn't have you... ♫]]''
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[[redirect:Franchise/MonstersInc]]
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'''Mike:''' Hey, hey, hey, hey... where ya going? Where ya going?\\

to:

'''Mike:''' Hey, hey, hey, hey... where ya going? Where ya going?\\What are you doing?\\

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* ReminderFailure: A {{subverted|Trope}} example occurs when Sulley tries repeating to himself where he should deliver Mike's paperwork. He corrects his own [[RepeatedRehearsalFailure verbalized mistake]] on which colored copies go where, but he never actually gets around to delivering them, forgetting because the human child Boo gets out.

to:

* ReminderFailure: ReminderFailure:
** Mike has Post-it notes inside his locker, reminding him to file his paperwork. He ''still'' keeps forgetting to file it.
**
A {{subverted|Trope}} example occurs when Sulley tries repeating to himself where he should deliver Mike's paperwork. He corrects his own [[RepeatedRehearsalFailure verbalized mistake]] on which colored copies go where, but he never actually gets around to delivering them, forgetting because the human child Boo gets out.
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** Mike repeatedly failing to do his paperwork.

to:

** Mike repeatedly failing to do file his paperwork.

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