History BewareTheNiceOnes / FIlm

%%* ''WesternAnimation/FindingNemo'':
%%** Dory, as the crab finds out the hard way.

* ''Disney/TheLionKing'':
** Pumbaa, Simba, Nala, and Rafiki all show shades of this.

** By ''Film/XMenTheLastStand'', Jean Grey the HotTeacher is a PersonOfMassDestruction.
** In ''Film/XMenDaysOfFuturePast'', pressing Hank's BerserkButton[[note]]Hurting Raven[[/note]] might lead to him strangling you. [[Film/XMenFirstClass Jekyll and Hyde indeed.]]

*** "[[ShoutOut No]] [[Film/TheLastCrusade ticket]]." Hee...

* ''RiseOfTheGuardians'':

* Optimus Prime in ''Film/{{Transformers}}: Revenge of the Fallen''. Sure, he's Optimus Prime, who willingly takes orders from humans, and would like nothing more than to find a diplomatic solution to the war that wouldn't mean killing any more of his kind, but let us not forget that he's supposed to be the single greatest Autobot warrior of all time. In ''Revenge'', he fights Megatron, Starscream and Grindor, all at the same time. To a standstill. And kills Grindor. And comes close to killing Starscream before [[spoiler:getting backstabbed by Megatron.]]

* In the first ''[[TheTransporter Transporter]]'', Frank Martin completes a delivery, then is asked to carry another package .. which blows up his car at a chance moment he's not driving it. UnstoppableRage ensues. Also CurbStompBattle.

* In ''AHistoryOfViolence'', Tom Stall looks like he might count, but his dangerous persona is dangerous all the time. For a straight example, his son. Nice, nerdy, would rather make fun of himself than get in a fight. Gets pushed too far and puts the quarterback school jock in the hospital, and assault and battery charges are mentioned. Later on, he saves his dad's life by blowing a bad guy's chest out with a shotgun.
* ''StrawDogs'' could be one of those over-the-top Public Service Announcements on Bewaring The Nice Ones. Dustin Hoffman is a mild-mannered American tourist FishOutOfWater in a close-knit rural English village. He puts up with all kinds of crap from them with barely an angry word. [[LetsGetDangerous Then they invade his home...]] and ''break his glasses''.

* Clark Griswold, the patriarch and protagonist of National Lampoon's ''Vacation'' films, fits this trope very well. Though he is generally laid back and optimistic and just wants his family to have a good time even when they're indifferent to his efforts, Clark has been known to snap and go into into grossly profane tirades when he is sufficiently angered or pushed beyond the limit of his patience, causing his wife to remark "when you get mad you get weird." In the first film when his family wants to give up on the trip to the amusement park following a series of misshaps, he lashes out at them and, using a number of profane expletives, he declares that their trip is no longer a vacation but "a quest for fun." Then in the third film, ''Christmas Vacation'', after his various efforts to assure a proper Christmas get together go awry, he has another violent meltdown in which he profanely denounces his boss.

* Harry Hart is one of the nicest characters in ''Film/KingsmanTheSecretService'', [[spoiler:when he and an entire church congregation are effected by Valentine's device which turns off their inhibitions and increases their rage, Harry is able to slaughter the vast majority of them quite easily and horrifyingly]].

* ''Fresh:'' A 12-year old boy in a gangster-ruled ghetto, getting [[ChessMotifs speed chess lessons]] from Creator/SamuelLJackson. Well, he's dead mea... [[ThePlan wait, what?]]

* Film/{{Mothra}} is the only truly benevolent Kaiju in the ''Franchise/{{Godzilla}}'' films preferring to live in peace on her island home with her fairy companions and her worshippers. That is, so long as [[BerserkButton you don't harm and/or kidnap said worshippers/airy companions]]. And, may Ghidorah have mercy on your soul if you dare harm [[MamaBear her children]].

* ''Film/TheLEGOMovie'':

* ''WesternAnimation/FindingNemo'':
** Dory, as the crab finds out the hard way.

** EVERY SINGLE ONE of the Parr family members, [[spoiler:and yes, that includes [[SuperpowerLottery the]] [[GooGooGodlike baby]] as well.]] ActionMom Helen takes out ''four'' of Syndrome's mooks despite being caught in two closing doors, [[MeaningfulName aptly named]] [[ShrinkingViolet Violet]] later manages to beat another one down with a stick, and [[FragileSpeedster Dash]] runs circles around a gaggle of them due to DeadlyDodging skills coupled with his ability to [[WalkOnWater run on water]]. And let's not forget that PunctuatedPounding in his sister's defense just a few scenes later.

* Nishi in Akira Kurosawa's ''The Bad Sleep Well.'' So quiet, so polite, such a good secretary! But the film is [[ShoutOutToShakespeare influenced]] by ''Theatre/{{Hamlet}}''...

* ''Film/RobRoy'' [=MacGregor=] just wants to farm his land, play with his children, and make love to his beautiful wife. When some jerkass Englishman generally destroys everything he has built up...
** Except that it almost became his undoing when he challenged Archibald Cunningham, the aforementioned jerkass Englishman, an expert swordsman and ruthless killer, to a duel. He quickly found himself overmatched, and it was only by pure luck and the unlikely success of grabbing the blade of the villain's sword at a crucial moment that saved him.

* In ''SkyHigh'', Leila refuses to use her plant-control powers for violence, even when being taunted by the self-replicating cheerleader Penny - until Penny slaps her.
* ''[[RepoTheGeneticOpera Repo! The Genetic Opera]]'' has Nathan Wallace, a sweet, loving, gentle, somewhat campy man who dotes on his daughter, [[IllGirl Shilo]]. He also happens to be a [[PsychoForHire Repo Man]]. [[spoiler:In 'Let The Monster Rise', when he realises that Rotti has stolen Shilo from him, he completely snaps. It ain't pretty]].
* ''Gremlins2TheNewBatch''. Gizmo, tired of the Gremlins abusing his gentle nature, fashions a flaming arrow out of office materials and burns Spider Mohawk alive.

* Pretty much the entire plot of ''Literature/{{Carrie}}''.

** Pumbaa, Simba Nala, and Rafiki all show shades of this.

-->'''Friar Tuck''': GET OUTTA MY CHURCH! OUT! OUT! OUT! OUT!

* The title character from ''WesternAnimation/TheIronGiant'' is a GentleGiant that lost his memories when he crashlanded on earth and befriends a local boy. [[spoiler: But when he thinks that the boy is killed during an attack by the army he [[UnstoppableRage turns into a literal killing machine]] armed with WaveMotionGun, ChestBlaster, and FrickinLaserBeams and [[https://www.youtube.com/watch?v=fu0scA8kqHQ destroys, no, ''annihilates'' the army with terrifying ease.]]]]
** [[spoiler: It's pointed out in the film that the Iron Giant was actually intended to be a ''ludicrously'' powerful defensive device. It's your best friend so long as you don't point something identifiable as a weapon at it or its friends. Once you ''do'' that though, the only thing that will save your puny, pitiful life is ThePowerOfFriendship]]
* Dory in WesternAnimation/FindingNemo, as the crab finds out the hard way.
* ''Disney/TheLionKing'':
** Pumbaa, Simba Nala, and Rafiki all show shades of this.
* In ''RiseOfTheGuardians'', the titular Guardians are pretty nice, but if you threaten the children under their care, like [[spoiler:Pitch and his nightmares]], they pull out all the stops, like North's Blitzen Blades and Bunny's Egg-sploders.
* At first glance, ''WesternAnimation/TheIncredibles''' Bob Parr is your everyday sitcom family man - kind, helpful, loves his kids, sucks at his job. Threaten his wife and kids, however, and he will ''[[PapaWolf ANNIHILATE YOU]]'', [[spoiler:as an unfortunate [[BigBad Syndrome]] finds out...]]
** EVERY SINGLE ONE of the Parr family members, [[spoiler:and yes, that includes [[SuperpowerLottery the]] [[GooGooGodlike baby]] as well.]] ActionMom Helen takes out ''four'' of Syndrome's mooks despite being caught in two closing doors, [[MeaningfulName aptly named]] [[ShrinkingViolet Violet]] later manages to beat another one down with a stick, and [[FragileSpeedster Dash]] runs circles around a gaggle of them due to DeadlyDodging skills coupled with his ability to [[WalkOnWater run on water]]. And let's not forget that PunctuatedPounding in his sister's defense just a few scenes later.
* ''Film/TheLEGOMovie'' gives us Princess Uni-Kitty, a pink kitty Lego figurine with a unicorn horn, and princess of Cloud Cuckoo Land. [[TastesLikeDiabetes She's sickeningly sweet,]] [[GenkiGirl silly and optimistic,]] [[spoiler: [[StepfordSmiler something she barely manages to maintain]] after her kingdom is destroyed by Lord Business]]. So how far do you have to push her before she snaps? [[SchmuckBait Are you stupid enough]] [[TooDumbToLive to try to find out?]]

* At first glance, ''TheIncredibles''' Bob Parr is your everyday sitcom family man - kind, helpful, loves his kids, sucks at his job. Threaten his wife and kids, however, and he will ''[[PapaWolf ANNIHILATE YOU]]'', [[spoiler:as an unfortunate [[BigBad Syndrome]] finds out...]]

* The title character from ''WesternAnimation/TheIronGiant'' is a GentleGiant that lost his memories when he crashlanded on earth and befriends a local boy. [[spoiler: But when he thinks that the boy is killed during an attack by the army he turns into a literal killing machine armed with WaveMotionGun, ChestBlaster, and FrickinLaserBeams and [[https://www.youtube.com/watch?v=fu0scA8kqHQ destroys, no, ''annihilates'' the army with terrifying ease.]]]]

* "Film/HorribleBosses": Sometimes [[NiceGuy Dale]], normally a very mild-Mannered and sweet-natured person, "snaps".

* "Film/HorribleBosses": Sometimes Dale, normally a very mild-mannered and sweet-natured person, ''snaps''.

* Film/DjangoUnchained: Dr. King Schultz is possibly the nicest protagonist from a Tarantino movie. He's also a deadly bounty hunter who you should never draw your guns on, as the Speck brothers found out the hard way, and whose patience should never be crossed [[spoiler: as Calvin Candie found out.]]

* Dory in FindingNemo, as the crab finds out the hard way.

** Pumbaa, Simba Nala, and Rafiki all show shades of this. MagnificentBastards like Shenzi and Scar have their limits, too.

* The ''Franchise/{{Scream}}'' series seems to employ this with their killer(s). They are nice and friendly, able to help with whatever. But they harbor a lust for killing and target and kill those closest to Sidney Prescott or those closest to her or just people in the town she's in. Notable case is [[spoiler:Charlie Walker]]. [[spoiler:He]] is just a normal teenager and [[spoiler:a Randy clone, which he basically acts like The MetaGuy. Then he stabs [[HaydenPanettiere Kirby]] [[TheLadette Reed]] in the stomach, twice. And then reveals himself to be one of the Ghostfaces.]] Damn.

** In the original trilogy, Luke is trying to fight Vader calmly and peacefully. Until Vader threatens to corrupt [[BerserkButton Leia]]. Luke promptly [[MemeticMutation bellows]], [[RoaringRampage charges]], [[UnstoppableRage beats Vader down]], [[AnArmAndALeg lops off his hand]] and [[OutOfCharacterMoment barely restrains himself from killing him.]]

** In the original trilogy, Luke is trying to fight Vader calmly and peacefully. Until Vader threatens to corrupt [[BerserkButton Leia]]. Luke promptly [[MemeticMutation bellows]], [[RoaringRageOfRampage charges]], [[UnstoppableRage ]]beats Vader down, [[AnArmAndALeg lops off his hand]] and [[OutOfCharacterMoment barely restrains himself from killing him.]]