->''"Monsters Inc. We scare because we care."''
--> -- '''Henry J Waternoose, CEO'''

Welcome to Monstropolis, a world where the monsters are just regular folks like you and me. When they hide in your bed/closet/hamper and scare you, it isn't [[ForTheEvulz because it gives them any sort of thrill]] but simply because [[PunchClockVillain it's 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 think that human children are highly toxic and only the bravest and most talented venture into a kids' bedroom. The populace live in terror of the possibility that a kid might find their way back through the door into the city, espeically since this generation of kids are harder to frighten. The difficulty in scaring children and the constant scrutiny of the CDA (Child Detection Agency) has led to a power shortage as Monsters Inc struggles to keep the city alit.

Now meet our heroes, [[TheHero James P "Sulley" Sullivan]] (John Goodman) and [[PluckyComicRelief Mike Wazowski]] (Billy Crystal). 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. 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's [[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'', the new film stars Mike and Sulley in their college days. Dan Scanlon is directing. Having never met before, Mike and Sulley end up becoming rivals in the scaring program at the University. However, their bickering leads them to be kicked out of the program. In order to get back in, they must join a fraternity and enter the Scare Games. Ending up in the lamest fraternity on campus OK (Oozma Kappa), Mike and Sulley must rally a group of underdogs to succeed in the games.

For information on the follow-up [=DVD=] short, ''Mike's New Car'', see the WesternAnimation/PixarShorts page.


* AdultFear:
** Mostly in retrospect, but notice that the BigBad's plan is essentially to kidnap children and use them for slave labor...
** Also when Sulley thinks Boo is being crushed by the trash compactor.
* 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
* AllForNothing: [[spoiler:The point of the CDA's decontaminations, when it's discovered that humans and their possessions are not toxic after all. They blew up a building just because a human kid was in it, for crying out loud!]]
* AllInTheManual: Boo's full name. It's [[TheDanza Mary Gibbs]]. Her first name is revealed in the film, since she signs all her sketches, but it's hard to spot.
* AllMythsAreTrue: Cryptids such as the Loch Ness Monster and Bigfoot are actually ex-citizens of Monstropolis who have been banished to the human world.
* AstonishinglyAppropriateInterruption
* BadToTheLastDrop: Whatever it is they drink instead of coffee, it's 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. Indeed, monsters would be perfectly content to leave humans alone if they weren't dependent on screams for energy.
* BigBad: [[spoiler: Waternoose.]]
* BigBadDuumvirate: Randall and [[spoiler: Waternoose.]]
* BigDamnHeroes:
** Sulley, to save Boo from 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]].
* BigNo: Sulley, eight times in a row [[spoiler: after he and Mike are banished.]]
* 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.
* BlowingARaspberry: Boo.
* BowelBreakingBricks:
** After nearly being discovered by Randall in the bathroom, we see a huge splash in the stall Mike, Sulley, 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's 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:
** Mike and Sulley 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."
** Sulley puts the stuff from Boo's room in a locker. Guess who opens that same locker a few scenes later?
* BrokenPedestal: [[spoiler: Waternoose becomes this to Sulley when the latter finds out the former's plans of kidnapping 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.
* 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).
* CassandraTruth: Celia demands that Mike tell her the truth about what's going on, which he does.
-->'''Mike:''' All right. You know that kid they're looking for? Well, Sulley let her in. We've been trying to put her back, and now Randall is chasing us, and he's trying to kill us!\\
'''Celia:''' You expect me to believe that pack of lies, Mike Wazowski?
* TheCatCameBack: Boo, when she first meets Sulley.
* CheatedAngle: The closet doors. When they're closed, they're almost always seen directly from the front. But when they're open, they're almost always seen from an angle. And they are only rarely seen from behind, mostly after Mike and Sulley are [[spoiler: sent away to the Himalayas, but there are a couple of other exceptionally brief glances.]]
* CheerfulChild: Boo.
* ChekhovsGun:
** Everything in the opening sequence with the monster-in-training and his practice run.
** Boo's [[spoiler:laughter.]]
** Socks.
* ChekhovsGunman: [[spoiler:Roz.]]
* ChekhovsSkill: Boo's ability to say "Mike Wazowski".
* 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's usually his own fault.
* ComicallyMissingThePoint:
** At one point, Sulley protests about Boo being in the restroom, not because she's human, but because she's a girl in the men's bathroom.
-->'''Mike:''' That is the weirdest thing you have ever said.
** Sulley: (as Randall beats him up) "I'm being attacked!" Mike: "No, I'm not attacking you. I'm trying to be honest."
* ComicBookAdaptation: Boom! Studios did a {{sequel}} of sorts, featuring Randall's return, [[spoiler:Waternoose]]'s escape from prison, [[spoiler:[[WesternAnimation/ToyStory Sid]] using the closet doors to his advantage, and the subsequent team-up of the three.]]
* ConeOfShame: Monsters who undergo decontamination by the CDA due to a 2319 call end up wearing one.
* ConfusedBystanderInterview: After Boo's presence is discovered, "witnesses" claim to have seen her use laser vision and mind powers.
* CorruptCorporateExecutive: [[spoiler:Mr Waternoose]], who is all too keen on keeping his company from going into the red ink, [[spoiler:even if it means breaking the law.]]
* CuteMonsterGirl: Celia. Boo, from Sulley's perspective.
* CurbStompBattle: Boo versus Randall.
* TheDarknessGazesBack: In the opening.
* DeadpanSnarker: Mike. Also Roz, whose incredibly deadpan voice often gives Mike the creeps.
-->'''Roz:''' I hope you filed your paperwork correctly for once... Your stunned silence is very reassuring.
* DeathGlare:
** Randall to Waternoose after the line: "Sullivan was ''twice'' the Scarer you will ''ever'' be!"
** When [[spoiler: Sulley scares Boo by accident and doesn't notice until it's too late]].
** Finally, when [[spoiler:Boo is about to attack Randall in the door vault]].
* DeepSouth: Randall's final fate is [[spoiler: getting trapped in a trailer and getting wailed on by a swamp lady who thinks he's an alligator]].
* DesignStudentsOrgasm: The opening credits.
* 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.
* DontCallMeSir: the easygoing Sulley has a brief moment asking ThoseTwoGuys not to call him Mr. Sullivan.
* DoubleJump: In the VideoGame ''Monsters, Inc.: Scream Team''.
* TheDragon: [[spoiler:Randall. He's even suitably reptilian.]]
* EmotionEater: The entire world is powered by children's screams of fear. [[spoiler:As they discover later, though, they get ''more'' power from laughter.]]
* EngineeredPublicConfession: [[spoiler:Waternoose]]'s near the end of the film.
* EtTuBrute: [[spoiler:How Sulley felt towards his mentor and close friend Waternoose.]]
* EurekaMoment:
-->'''Mike:''' At least we had some laughs, right?\\
'''Sulley:''' Laughs...
* EvenEvilHasStandards: The whole monster world might scare children as an energy source, but they'd never ''hurt'' a kid. [[spoiler: And the idea of kidnapping them is not only a crime but seen as just plain wrong]]
* ExtremelyShortTimespan: The bulk of the film takes place over the course of two days.
* TheFaceless: Every CDA member, with the exception of #001: [[spoiler:Roz]].
* 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.]]
* {{Foreshadowing}}:
** "James, this company has been in my family for three generations. I would do anything to keep it from going under."
** " "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 Mike and Sulley meet after they get banished?
** The scene where Boo's screaming causes the light to flicker while her laughter causes a power overload failure in Mike & Sulley's apartment.
** An extremely subtle one, but when Mike is running away from Randall only for Randall to be shown lying in wait for Mike, Randall is camouflaged right near one of Waternoose's portraits. [[spoiler: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, Sully, 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. [[spoiler:She later slams it shut [[AmusingInjuries on Mike's fingers]]. At the end of the film it is revealed she was the head of the CDA.]]
* ForWantOfANail: If Mike hadn't forgotten to file his paperwork, Sulley wouldn't have found Boo and Randall [[spoiler:and Waternoose]] would never have been discovered.
* 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.
* GambitRoulette: Mike and Sulley's plan [[spoiler: 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 only under a minute to think up of the plan]].
* GenreBusting: It's a monster movie/kid flick/invasion movie/sci-fi/family drama/comedy.
* GentleGiant: Sulley scares young kids for money. He's a very jovial guy off-duty.
* GettingCrapPastTheRadar:
** The snowcone:
--->'''Yeti:''' (''holding up balls of yellow snow'') Snow cone?\\
'''Mike:''' Yuck.\\
'''Yeti:''' No no no, don't worry, it's lemon.
** This is also invoked in the scene where Sulley and Mike are trying to get Boo to laugh again to reactivate all the closet doors. Mike tries a trick where he [[GroinAttack lands on a metal bar right between his legs and is in notable pain.]] Even though you can't ''see'' anything, '''ouch'''.
* 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; scene cuts'')\\
'''Mike:''' [[YouJustHadToSayIt I cannot 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: Celia.
* 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.
%%* HeKnowsTooMuch: "She's seen too much! You ''both'' have."
* TheHero: How Mike views himself. Actually, it's Sulley, even though Mike is responsible for manning Sulley's day-to-day matters. See also TheLancer and {{Sidekick}}, both below.
* 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 [[WesternAnimaton/FindingNemo under water]]).
* HollywoodChameleon: Randall.
* HonestCorporateExecutive: Sulley becomes one at the end of the movie.
* IHaveJustOneThingToSay: ''*pulls a sock out of his mouth and throws it*'' Catch!
* INeedToGoIronMyDog: The Yeti's excuse:
-->'''Yeti:''' Oh, would you look at that? We're out of snow cones.
* InkSuitActor: Despite the fact that the cast is full of adorably inhuman monsters they still manage to resemble their voice actors, especially Mike who could not be ''more'' Billy Crystal. And Randall '''is''' Creator/SteveBuscemi. According to the DVDCommentary, Buscemi accused the casting director of typecasting him when he first saw a picture of Randall.
* {{Invisibility}}: Randall.
* IronicEcho: When Mike parodies the training instructor:
-->'''Mike:''' Well, I don't know about the rest of you guys but I spotted several big mistakes.
* IsThatCuteKidYours: Waternoose asks Sulley this when he first sees Boo, though Sulley and Mike cover this [[BlatantLies by saying that she's Sulley's "cousin's sister's daughter" and that it's "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: [[spoiler:Waternoose did this quite a while ago when he decides that ''nothing'' would stop him from saving his company.]]
* KarmaHoudini: Despite being directly involved in all the nefarious goings-on, including attempted child-torture, [[spoiler:Fungus]] keeps on working at Monsters, Inc. as if nothing happened. Granted, it's strongly implied he didn't like it at all and only did these things out of fear -- he's shown to be happier with his new lot in life afterwards.
* KickTheDog:
** Intentionally performed by Randall on ''way'' too many occasions to count.
** [[spoiler:Waternoose]] wasn't kidding about what he said with the promise to keep his company afloat, due to [[spoiler:his kidnapping of Boo]]. Yes, he would do ''anything'' to keep it afloat [[spoiler: -- even if it meant breaking the law]].
* KickTheMoralityPet: Unintentionally performed by Sulley toward Boo, leading to a HeelRealization.
* KnightTemplar: [[spoiler:Waternoose wants to save his family business and Monstropolis from collapse due to a power shortage. His "solution" drives him well over the MoralEventHorizon 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]].
* LetUsNeverSpeakOfThisAgain: [[ChekhovsGunman CDA Agent #1]] gives this order at the end of the movie, regarding the whole mess that resulted from Boo's kidnapping.
-->'''#1/[[spoiler:Roz]]:''' None of this ever happened, gentlemen, and [[spoiler:[[BrickJoke I don't wanna see any paperwork on this]].]]
* LizardFolk: Randall.
* 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.
* TheManBehindTheMan: [[spoiler:Waternoose.]]
* MasterOfIllusion: Randall.
* MeanCharacterNiceActor: Roz and Randall enjoy good-natured jokes as the bloopers indicates.
* 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''.
* MistakenForGay: Mike and Sulley several times, but it's kept rather subtle.
* TheMole: [[spoiler:Both Randall and Waternoose]]. Before TheReveal showing how grossly '''''vile''''' he really is, the former is only depicted as cocky and mean, thus less surprising than the latter Mole.
* MonsterCloset: Technically, the closets aren't hidden, but it's impossible to tell from the outside when one of them's gonna open and reveal a monster.
* 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 motivations is all about breaking the scare record up until he flat out tells him it's not.
* MultiArmedMultitasking: The sushi chef.
* MultipleHeadCase:
** ''Very'' briefly seen, after [[spoiler:Mike and Sulley expose [[BigBad 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?
* NestedMouths: In Harryhausen's, one of the monsters has a second monster for a tongue, which eats the food.
* NeverSayDie: Averted before the first scene even ends, and directly said many, many times as an example of how dangerous children are to the monster world. But one of these qualifies as a moment of funny:
-->'''Sulley:''' This might sound crazy, but I don't think the kid's dangerous.\\
'''Mike:''' (''[[SarcasmMode dripping with sickly-sweet sarcasm]]'') ''Really?!'' Well, in that case, let's keep it. I always wanted a pet... '''that could kill me!'''
* NiceJobBreakingItHero:
** [[spoiler: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: [[spoiler:Although Sulley and Mike ultimately manage to get Boo back into her bedroom, and expose his boss, their actions also caused the company to nearly be shut down, and almost cause Monstropolis to be in a permanent blackout as a consequence. The only reason it didn't turn out that way was because it was discovered that the children's laughter had 10x the power input of scream. In addition, the Scarers seem well-adjusted to the Laughter switch]]
* NonMammalianHair:
** Roz ([[spoiler: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 octopi, will inevitably have some form of hair on their heads.
* NotAfraidOfYouAnymore: [[spoiler:Boo to Randall, right after beating the crud out of him to save Sulley.]]
* OddCouple: Sulley and Mike. See also OppositesAttract, below.
* 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."
** Mike again upon hearing Celia's furious voice and seieng her stride him him with [[ConeOfShame cones]] around her neck as well as those or her snakes.
** George in the locker room when [[spoiler: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:''' [[OhCrap Oh, dear.]]\\
'''CDA Agents:''' Get him! (''they bowl George over'')
** Also Randall, after Sulley and Boo turn the tables on him and Sulley makes it very clear he's about to get his comeuppance.
** Also Waternoose, [[spoiler: 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's said.]]]]
* OppositesAttract: Mike and Sulley.
* OverreactingAirportSecurity: The CDA's response to a 2319 alarm leaves George very humiliated.
* PackedHero: Parodied. Boo loses one of the "eyestalks" of her monster costume in a trash can. Sulley sees it and thinks she's 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.
* 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...?\\
'''Mike:''' Well, you know, maybe you should just take a minute and ead-ray your ipt-scray!
* PluckyComicRelief: Mike, and Boo to a lesser extent.
* PortalDoor [[PortalNetwork and Network]]: The closet doors.
* PottyDance
* PoweredByAForsakenChild: [[spoiler:[[BigBad Waternoose]]]] and Randall's plan to solve the power shortage.
* PowerWalk:
** The scarers entering the power company floor. A ShoutOut to ''Film/TheRightStuff''.
** Played with in the "out-takes" 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.
%%* ProductionForeshadowing: [[WesternAnimation/FindingNemo Nemo]].
* ProsceniumReveal: The movie 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.
* PsychoForHire: Randall Boggs.
* 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. (He would be AffablyEvil if only he were more, well, affable.)
--->'''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.
* ReasonableAuthorityFigure:
** Waternoose. [[spoiler:Which makes the revelation that he's [[JumpingOffTheSlipperySlope jumped off the slippery slope]] beforehand even more surprising.]]
** Also, CDA Number One. When the matter of what to do about Boo arises, Sulley says "I just want to send her home." CDA Number One replies, "Very good."
* RepeatCut: When the door on which Mike, Sulley 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.
* 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.
* ReverseMole: [[spoiler:[[ChekhovsGunman Roz]] is working for the CDA as #1.]]
* RunningGag:
** 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''.
** It's 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 Mike and Sulley -- 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?
* SceneryPorn:
** The closet door storage chamber is this in a "Holy SH**, this is awesome!!" way.
** All of the doors Mike and Sulley 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: In this [[http://pixar.wikia.com/File:Monsters_inc_ver4.jpg Japanese poster]], as well as the 2009/3D Blu-Ray and 2002 DVD covers of the movie.
* SearchingTheStalls: Boo and Sulley hide from Randall in a toilet stall. He punches the stalls open one by one, and Sulley flinches as every door opens. [[spoiler: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.]]
* ShovelStrike: [[spoiler:Randal's fate. He's banished to a trailer in the bayou where a hillbilly repeatedly whacks him with a shovel, mistaking him for a gator]].
* ShoutOut: See [[ShoutOut/MonstersInc here]].
* 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 [[spoiler: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-pooh!\\
'''Celia:''' Googly-bear!
* {{Sidekick}}: Mike views Sulley as his {{sidekick}}, but everyone else can see that Mike is Sulley's.
* SmugSnake: Randall.
* TheSmurfettePrinciple: The only major female characters in the movie are a little girl with limited dialogue, the forgettable love interest Celia, and [[spoiler:Roz the undercover CDA agent]], who has little screen time. The male-to-female ratio is 4:2.
* TheStarscream: After [[spoiler:Waternoose]] tells Randall to leave no witnesses, Randall replies in a manner that lets the audience know that he's planning to backstab [[spoiler:his own boss]] when this is all over.
* 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.
* 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 Mike and Sulley's alibis as part of their coverup]].
* SuddenlyShouting: Mike. At least three times.
-->'''Mike:''' ...lie in bed, sleep in, or simply, ''WORK OUT THAT FLAB THAT'S HANGIN' OVER THE BED''!\\\
'''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''!
** 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.
* SurprisinglyHappyEnding: The movie seems like it's about to have a BittersweetEnding in the form of [[spoiler:Sulley having to part ways with Boo]], but it turns out that [[spoiler:Mike Wazowski recreated the door that leads to her room, so Sulley can at least still visit her]].
* 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 electricity. [[spoiler: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 electricity than screams of terror did.]]
* TakeMyHand: Sulley to Mike.
* 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's about to say "you", when Sullivan stumbles by outside and Mike accidentally finishes the statement with a surprised "[[HoYay Sulley!?]]".
* ThingsThatGoBumpInTheNight: A PerspectiveFlip, showing that said things are actually more scared of ''us''.
* ThoseTwoGuys: Needleman and Smitty.
* 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]].
* TreacherousAdvisor: [[spoiler:Waternoose is revealed to have been behind the conspiracy all along.]]
* {{Tsundere}}: Celia is Type B, with "deredere" default.
* UnstoppableRage: Sulley, Mike and Boo. Sulley when [[spoiler:he releases Boo from the scream extractor]], Mike when [[spoiler:he and Sulley are banished]], and finally Boo in the door vault when [[spoiler:she attacks Randall and in doing so saves Sulley]].
-->'''Mike:''' YOU'RE STILL NOT LISTENING?! (''screams with rage and dives at Sulley'')
* VillainousBreakdown:
** At the film's (second) climax, [[spoiler:Waternoose himself]] throws a fit of temper tantrum, straight out yelling to Sulley that [[spoiler:he'll kidnap a thousand children before letting his company die.]] He was about to throw another one immediately, [[spoiler: but he can't do much while the CDA escort him out for his crimes]]. But the second tantrum [[spoiler:does take its toll on Sulley's emotions when Waternoose [[NeverMyFault blames him]] ''[[NeverMyFault entirely]]'' [[NeverMyFault for the company's demise and ruining any chances Monstropolis has of recovering from the blackout]]]].
** Before that, [[spoiler:Randall flies into a borderline psychosis and tries to murder Sulley because Waternoose all but tells him that he'll never live up to Sulley, no matter what he does or how hard he tries.]]
* WeNeedADistraction: When Randall chases Sulley and Mike through the scare floor [[spoiler: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 Sully and Mike to make their escape.
-->'''Celia''': Go get 'em, Googly-Bear.
* WellIntentionedExtremist: [[spoiler:Waternoose: "I'll kidnap a ''thousand'' children before I let this company die! And I'll silence ''anyone'' who gets in my way!"]]
* WhamLine:
** How [[spoiler:Waternoose's duplicity]] is revealed.
--->'''Mike:''' That's not her door...\\
'''[[spoiler:Waternoose]]:''' I know, I know. (''Cue [[spoiler:Randall.]]'') It's ''yours''.
** A minor one comes during the climax: [[spoiler: Waternoose has Sulley beaten and he's about to grab Boo, when the child he's holding says this:]] "Good night, Mom".
** And before that:
--->[[spoiler:Waternoose: I'll kidnap a '''''thousand''''' children before I let this company die! And I'll silence '''''anyone''''' who gets in my way!]]
* WrongGenreSavvy: Mike, throughout the movie he always thinks he is the star and Sulley is his sidekick.
* WrongInsultOffence:
-->'''Randall:''' Wazowski! Where's the kid, you little one-eyed crettin?\\
'''Mike:''' First of all, it's pronounced cree-tin. If you're going to threaten me, do it properly.
* XDaysSince: The scare factory has a sign counting the days since the last accident.