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3%% This page has been alphabetized. Please add new examples in the correct order. Thanks!
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6%% Animated movie examples go in the FILM section, NOT the Western Animation section.
7%% See also the following Wiki Talk thread: https://tvtropes.org/pmwiki/posts.php?discussion=13100880850A36680100&page=1
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12[[quoteright:250:[[WesternAnimation/CodenameKidsNextDoor https://static.tvtropes.org/pmwiki/pub/images/btnows.png]]]]
13[[caption-width-right:250:You wouldn't like her when she's angry.[[note]]...When you destroy her ''Rainbow Monkeys'' and her ''Mr. Huggykins''.[[/note]]]]
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15* ''WesternAnimation/TheAdventuresOfTintin1991''
16** The cartoon's Professor Calculus is normally a soft-spoken, mildly eccentric, rather charming old man, who, by virtue of his poor hearing and generally good demeanor, does not notice most of the jokes at his expense, and doesn't care about those he does hear. But then in "[[Recap/TintinDestinationMoon Destination Moon]]" Captain Haddock mocked his ambitions for space travel and accused him of "acting the goat"...
17** In the [[ComicBook/{{Tintin}} comic]] at least, his rant at Captain Haddock lasts for several pages, and includes shouting that he is not the CloudCuckooLander that everyone believed him to be. It ends when he shows Captain Haddock the nuclear powered rocket as big as a skyscraper which he designed and built.
18---> '''Calculus:''' See what "the goat" CREATED!
19* ''WesternAnimation/AdventureTime'':
20** [[EmperorScientist Princess Bubblegum]]. As [[spoiler: Ricardio]] found out, hurting Finn, Jake, AND Lady Rainicorn is a quick way to get your ass handed to you, even if you technically have no ass.
21** Finn himself is a pretty nice guy, willing to help anyone who needs it... but he'll also slay ''anything'' that's evil. That's his deal.
22** Sweet P. Trunks is just a toddler who happens to be very, VERY big. He's incredibly nice and loving... but push him too far and [[SuperpoweredEvilSide his original form will take over...]] and said original form just happens to be [[spoiler: [[TheDreaded The Lich]].]]
23* ''WesternAnimation/AdventuresOfTheGalaxyRangers'': The Galaxy Rangers are all heroes. However, Zach has taken starships out of orbit with his ArmCannon. Niko? Plays like a cross of a [[Franchise/StarWars Jedi]] and a [[Franchise/MassEffect Biotic]], carries a {{BFG}}, and is also very good with unarmed combat. Doc is a BadassNormal in a fight, and manged to take down one of the nastiest villains the show whipped up ''singlehandedly.'' Either that or he'll just make every computer in the room riot. Shane was designed as a living weapon. Just get out of the guy's way...Worse is [[SixthRanger Zozo]], who is a [[{{Hobbits}} short, unassuming alien from an agricultural world]] and the friendliest, most cheerful guy ever. Piss him off or threaten the folks he's with? Well, he's got an entry under {{Ambadassador}} for a reason.
24* Dulcinea from ''WesternAnimation/TheAdventuresOfPussInBoots'' is the sweetest girl you'll ever meet, but she is completely willing to kill to protect her town and its orphans. This takes a magic sword by surprise as it had chosen her assuming she wouldn't be able to kill.
25* Francine Smith from ''WesternAnimation/AmericanDad''. In spite of her good-natured demeanor, she can snap in a rather disturbing manner. On one side, she can be a force to be reckoned with if she believes someone is harming her children (provided it's not one of those times where she's being abusive). On another side, she is outright terrifying if someone provokes her badly enough. Stan is rightly horrified of forgetting their anniversary because of the NoHoldsBarredBeatdown she gave him the last time it happened. Unfortunately, Stan's too much of an idiot to remember ''why'' she beat him up until it's too late.
26* ''WesternAnimation/AquaTeenHungerForce'' has Willie Nelson (not [[Music/WillieNelson that one]],) a onion-spider monster that lives in the Aqua Teens' attic. He comes out from the attic in "The Shaving" in a half-hearted, ineffectual attempt to scare the trio, and despite Shake's attempts to make him scarier he's ultimately too nice of a guy for it to stick. And then the trio (plus Carl) finally go up to the attic where they find [[spoiler: mountains of mutilated corpses that Willie Nelson's been eating for years, right before Willie rips off Carl's arms to drink his "juice".]]
27* ''WesternAnimation/{{Arthur}}'':
28** The quiet, and usually introverted Fern has shown a willingness to take (non-violent) revenge on those who mock her, as the episodes "Draw!" and "War of the Worms" can attest.
29** Arthur, normally a kind and friendly guy, [[WouldHitAGirl punches out DW]] in "Arthur's Big Hit" when she breaks his model plane and [[NeverMyFault refuses to take responsibility for her actions.]]
30* ''WesternAnimation/AvatarTheLastAirbender'':
31** Aang is a goofy little kid, okay? He's a monk, he loves riding animals and dropping pudding cakes on fuddy-duddy heads, and playing with kids and generally being the sweetest person he possibly can. He can fight pretty darn well, but always goes for disarms or knockdowns... until you cross the MoralEventHorizon in his presence. Then his [[GlowingEyesOfDoom eyes start glowing]] and he becomes a demigod capable of throwing hurricanes, tidal waves and mountain ranges around like softballs. He is so terrifyingly powerful and destructive he scares the hell out of his enemies, innocent bystanders, his friends and even ''himself''.
32*** And tearing up mountain ranges or redirecting rivers isn't even the ''really'' scary thing. The worst bit? He can and will rip out your ''soul'' (not literally, but [[spoiler: getting debended permanently]] has been referred to as something of the same effect), and there's nothing anyone can do to stop him.
33** Aang's TrueCompanions aren't too shabby either. Katara, his cuddly, adorable LoveInterest, always loving and nurturing, a true TeamMom to her very core, can [[MakingASplash blast you through a wall with cupful of water]] and perhaps [[AnIcePerson turn you into an ice cube]] in the process. Piss her off enough and she can ''[[PeoplePuppets bend the blood in your veins]]''.
34** Sokka, the epitome of PluckyComicRelief, also happens to be a swordfighting prodigy, a brilliant tactician, and a genius inventor.
35** Toph may not be as nice, but [[DefrostingIceQueen is really kind when you get to know her]]. Even still, remember that [[LittleMissBadass she's not just boasting when she claims to be the greatest Earthbender in the world]].
36** Iroh is genuinely a [[CoolOldGuy lovable, good humored old man]], who loves nothing more than drinking tea and board games... and also one of the greatest strategists, tacticians, warriors, and firebenders in the world. Admiral Zhao learns this the hard way.
37** [[MeaningfulName Ursa]] is a gentle, elegant lady who has probably never hurt a fly. But [[spoiler:threaten her kids and [[MamaBear she will]] ''kill you''; there's a reason the trope is called MamaBear.]]
38** Hei Bai is a kind forest spirit--after all, who would fear an entity who takes the form of a panda? Messing with his forest is still a bad idea.
39** Ty Lee. She cartwheels, she giggles, she flips around her cute ponytail, [[BreadEggsMilkSquick she takes out your bending and the movement of your limbs with a few well-placed pokes.]] She only needs about four or five seconds in a fight with an unwitting opponent and she will kick ass.
40** Arguably, Monk Gyatso, an Airbender who taught Aang and acted as a father figure to him at the Southern Air Temple. He was a lighthearted old man who enjoyed training Aang and always made sure there were time for fun and games. Early in the series, Aang finds his skeleton, surrounded by numerous skeletons in Fire Nation armor, which makes it very clear Monk Gyatso killed them. Keep in mind that not only is Gyatso an elderly man in a tribe of pacifists, but that Airbending is probably the least lethal of any bending and that the Fire Nation soldiers, at the time of their death, were also being powered by Sozin's Comet, boosting their power exponentially.
41* ComicBook/AntMan is ''WesternAnimation/TheAvengersEarthsMightiestHeroes''' team pacifist, and will continue trying to negotiate a peaceful end to a confrontation well past the end of his teammates' patience. Unless the bad guys he's trying to talk down hurt ComicBook/TheWasp. Then they will get ''owned''.
42* For the most part, WesternAnimation/BabyHuey is fairly harmless ([[DoesNotKnowHisOwnStrength well, he usually wouldn't harm someone on purpose]]), unless he realizes someone's trying to harm him, then all bets are off.
43* ''Franchise/Ben10'':
44** Gwen Tennyson and Grandpa Max Tennyson in ''WesternAnimation/Ben10AlienForce''
45*** Grandpa Max is a BadassNormal and he's super, super nice to everyone, but when you push his buttons it's not pretty.
46*** Same with Gwen, she's the nicest of the trio, but when she blows up, THINGS BLOW UP WITH HER. (Obvious example: "Max Out")
47** The titular Ben "10" Tennyson himself qualifies; a kind-hearted, outgoing guy (though a bit egocentric and foolish at times), but if you push him too far ([[WesternAnimation/Ben10UltimateAlien like say, put his girlfriend's life at risk just to spite him]], [[spoiler:[[WesternAnimation/Ben10Omniverse destroying his favorite alien form]]]] or harm his friends), kiss your ass goodbye because [[LetsGetDangerous he'll kick it into oblivion]].
48* GentleGiant Modo from ''WesternAnimation/BikerMiceFromMars''. He's basically one of the nicest characters on Biker Mice, but it's a very bad idea to provoke him by [[BerserkButton calling him a rat or threatening his bike.]]
49* Todd Chavez on ''WesternAnimation/BoJackHorseman'' is for the most part a laid-back, go-with-the-flow kind of person, always putting up with [=BoJack's=] unkindness to him... which makes it all the more shocking when Todd loses his cool upon finding out that [[spoiler: [=BoJack=] had sex with Emily.]]
50--> "You can't keep doing this! You can't keep doing shitty things, and then feel bad about yourself like that makes it okay! ''You need to be better!"''
51* ''WesternAnimation/CampLazlo'': Be very afraid if you ever manage to push ExtremeDoormat Slinkman to his breaking point, as happened in "Squirrel Scout Slinkman".
52* ''WesternAnimation/CaptainPlanetAndThePlaneteers'':
53** [[MotherNature Gaia]] is motherly, patient and generally friendly, but in "[[Recap/CaptainPlanetAndThePlaneteersS5E7NoPlaceLikeHome No Place Like Home]]", seeing a coyote family suffer because of human thoughtlessness makes her furious enough to leave Hope Island in a red flame, with an ominous tune to match her mood. She can also become a MamaBear when [[LikeASonToMe the Planeteers]] are in danger... a Mama Bear armed with the entire power of nature.
54** Gi is usually the TeamMom and peacemaker who tries to [[RousseauWasRight see the good in all humans]]. When she found out someone had shot her friend David King (a teacher in an inner-city school), it's implied that she was planning on shooting the perpetrator with the guns they went undercover to find. Upon actually finding the guy responsible, she tried to drown him; the gunman only walked away with his life because [[TheSoftHeartedWarrior Wheeler]] was nearby and [[IfYouKillHimYouWillBeJustLikeHim managed to talk her out of it]]. You wouldn't like her when she's angry.
55** Ma-Ti is the trope namer for WhatKindOfLamePowerIsHeartAnyway, but that's only because he's so kind he never had the heart (hah) to use it to its full potential. Gaia said Heart was the most powerful of the five for a reason, which is displayed in detail anytime Ma-Ti decides to get serious.
56* Seemingly invoked on WesternAnimation/{{Casper}} in one of the older cartoons, ''Fright from Wrong'', when his nasty uncles force-feed him a huge jar of "Mean Pills" that practically warp him into a red devil creature. Naturally, this [[GoneHorriblyRight backfires]] when Casper [[HumiliationConga spends the rest of the short putting them through the wringer]] (both literally and figuratively). It would appear that this example wouldn't count since Casper was drugged to act like that, right? Eh; not so much... he reveals at the very end that he never took the pills; all the cartoonish brutality he'd unleashed on his uncles was ''all'' him just trying to teach them a lesson! The little Friendly Ghost really ''can'' be scarier than given credit for.
57* In a ''WesternAnimation/CelebrityDeathmatch'' between Tom Hanks and Sean Penn, Hanks, nice guy that he is, doesn't put up any sort of a fight. It is only after Penn attacks an innocent photographer that Hanks really gets into the Deathmatch spirit.
58** When he has his personality swapped with that of Genghis Khan, Gandhi proves that he is quite an impressive fighter.
59** David Spade gets pummeled for most of the fight, right up until he slingshots a baseball through Steven Seagal's brain.
60** Mandy Moore is sickeningly sweet at the start, even crying to the referee that Pink is being mean to her when she gets hit in the face. But when Pink calls her a 3rd-rate Britney wannabe, she goes totally bananas and nearly stabs her to death with a lollipop.
61** When he gets riled up, Garth Brooks manages to subdue ''Marilyn Manson''. Had his banjo not broke, he might have even been able to kill him.
62** A sort of weird example with Steve Irwin where he does manage to kill Medusa, but it's totally by accident, and he wasn't actually interested in fighting her to begin with, just educating people about her existence.
63** Keith Flint finds out the hard way when he interfere with a [[Music/CelineDion certain Canadian]] while she was singing only to discover what happens when messing with her. To be fair, it was unlikely on her free will through because Zatar the Alien had took over her or clear if it's was really her.
64* ''WesternAnimation/ChipNDaleRescueRangers'':
65** Gadget snaps twice: in "The Case of the Cola Cult" when her friends are endangered and her inventions are sabotaged and, in "Dirty Rotten Diapers", when her repeated attempts to solve the situation peacefully are met with nothing but extreme hostility and violence from the subject in question.
66** Even more to the point is nice guy and all around fun loving Dale, who upon losing his memory becomes for all intents and purposes the Chipmunk equivalent of Franchise/{{Rambo}}.
67* ''WesternAnimation/ClassOf3000'': Philly Phil is one of the more even-tempered kids and usually an inversion of the FieryRedhead trope, which makes the very few times he actually gets angry more shocking.
68* ''WesternAnimation/ClassicDisneyShorts'':
69** At the climax of ''WesternAnimation/LendAPaw'', Pluto's [[GoodAngelBadAngel shoulder angel]] gets fed up with being pushed around and gives Pluto's shoulder devil what-for, scaring him off for good.
70** ''WesternAnimation/LambertTheSheepishLion'': Lambert is a quiet, bashful GentleGiant... until a wolf threatens his mother, where he unleashes his inner lion and chases the predator off.
71* Adorable little Dotty from ''WesternAnimation/ClueClub.'' In one episode, a mischievous monkey kept dousing Woofer and Wimper with a water hose. When he tried it a third time, Dotty threatened to turn the monkey into a monkey stew.
72* ''WesternAnimation/CodenameKidsNextDoor'':
73** Most of the time Kuki/Numbuh 3 is the team's sweet [[TheDitz ditzy]] GenkiGirl, but when she does get angry, epic asskicking usually ensues.
74--->'''Mr. Boss''': Quick! RUN LIKE LITTLE GIRLS!
75** Sonya/Numbuh 83 is also the most timid out of Sector W. She's also [[PrimalFear very afraid of the dark]]. If a villain threatens to lock her and her friends in a dark place, it will instantly erase the timidness, and replace it with a raging beast that even Satan would fear.
76--->'''Numbuh 83''': ''(In a cutesy tone after singlehandedly dispatching a whole bunch of ice cream men)'' "I don't like the dark".
77* ''WesternAnimation/DanVs'': Chris is an accident-prone ExtremeDoormat who is often a pushover and rarely has his JerkassBall moments. That said, he isn't afraid to retaliate when he's ''REALLY'' pushed over the edge. Just ask Dan after what he went through in "Monster Under the Bed."
78* ''WesternAnimation/DannyPhantom'':
79** Jack Fenton. Often the BumblingDad, he retains an optimistic, jolly attitude. But when his loved ones are threatened, he turns into a straightforward BadassNormal and then his victims are in for a world of hurt.
80** Jack? JACK? No no no no no. [[MamaBear MADDIE]]. In "Maternal Instinct", Danny's lost his powers due to a Fenton device and Vlad's set several ghosts in their direction. The ghosts may as well have just lined up and waited to have their arses kicked once Maddie got done.
81** Danny himself applies; he's normally a laid-back, friendly kid... when he's human. It's when he's not that you ''really'' have to watch out for, as numerous lesser foes found out... as did Vlad, if in [[BadFuture another future]].
82* Dr. Reginald Bushroot from ''WesternAnimation/DarkwingDuck'' is normally so adorable and timid that sometimes it's hard to remember that he's a [[AntiVillain villain]] (WordOfGod has even stated that he would have eventually made a HeelFaceTurn). However, when he saw what looked like Darkwing Duck [[ItMakesSenseInContext kissing the bride he created for himself]], his immediate response was to try to ''[[{{Yandere}} kill Darkwing with a lawnmower]]''. Also, in his first appearance, one of the first things Bushroot decides to do with his new powers is make the scientists who bullied him [[TheDogBitesBack have a little "accident..."]] [[spoiler: A later story in the comics revealed that Bushroot's bullies didn't die, but turned into plant/duck hybrids who are terrified of Bushroot because of what he did to them.]]
83* ''Franchise/DCAnimatedUniverse'':
84** In ''WesternAnimation/BatmanTheAnimatedSeries'' Robin is the friendly sociable counterpart to Batman's TheDreaded (in some versions the reason Batman takes on a KidSidekick is because frightening children is a problem when you're trying to save them). Until Robin finds out the man who killed his parents has returned to Gotham City. Tony Zucco soon learns that all those years, he was afraid of the wrong one.
85** In the series finale of both ''WesternAnimation/SupermanTheAnimatedSeries'' and ''WesternAnimation/JusticeLeague Unlimited'', Superman encounters situations that stretch even his patience.
86*** In TAS, after taking some of it out on a few humans (some more deserving of it than others), he goes into UnstoppableRage mode on the cause of it all.
87*** In ''WesternAnimation/JusticeLeague'', he finds it an excuse to cut loose on an ''extremely'' powerful foe - the same one who pushed him over the edge last time, in fact - all the while ranting about how nice it is to let go of his inhibitions when he normally has to be so careful, because as far he's concerned the world might as well be cardboard. Darkseid pushed Superman too far. [[http://www.dailymotion.com/video/x7czid_superman-true-power_shortfilms Superman punched him across the city]]. Notable bit of summary: at one point Superman throws an uppercut. After the NoMoreHoldingBackSpeech. The punch itself seems to cause about three or four meters of shockwave around it.
88** The episodes featuring [[EvilCounterpart the Justice Lords]] provide a pretty terrifying example of what happens when Luthor pushes Superman too far.
89** Franchise/TheFlash gets his own shot at this too.
90*** The next time you start thinking that he doesn't extend much beyond being the goofy, flirtatious, practical joker of the League, just remember that this is the man who can ''make you explode'' with his bare hands or rip you to pieces by circumnavigating the globe and [[https://www.youtube.com/watch?v=326s1ISaVRI coming back to smack you one.]]
91*** On one occasion when Lex Luthor and Flash had their brains swapped Luthor had absolutely no reservations about using Flash's powers to their full extent - and runs highly destructive circles around the entire League as they're trying to capture him. Flash doesn't use a couple of his abilities for a good reason.
92*** And even earlier than that, in the episode "Secret Society", shortly after the League [[spoiler:temporarily disbands on bad terms]], Flash is trying unsuccessfully to find the location of his personal villain, The Shade. He tries to interrogate several of Shade's known henchmen, with no luck. It culminates in him attempting to intimidate one thug by dangling him over the edge of a rooftop by his legs. Of course, the thug isn't intimidated and even mocks Flash's attempt at a Batman-style interrogation... but by this point [[https://www.youtube.com/watch?v=b7H3m1rPVIM Flash is utterly fed up]] ([[TranquilFury though his face doesn't show it]]).
93---->'''Thug:''' Look, I know Batman. I once ratted out a counterfeiter to Batman. And believe me, you are no Batm-- ''(Flash drops him)'' [[OhCrap aaaAAAAAAAAHHHHHHHHHHH]]!!!
94** J'onn is generally very restrained, and while a bit distant, is still kind. He does have moments where he shows how strong he can be. These moments can involve his physical powers, such as the occasions he phases his hand into someone's chest; mental powers, like giving Kraggar permanent brain damage; or both, like [[https://www.youtube.com/watch?v=CEPITNX9a88 how he deals with Task Force X and their informant]]. As he puts it, "Is being in here with me what you ''truly'' desire?"
95* ''WesternAnimation/DextersLaboratory'':
96** You '''do not''' want to see Dexter's father angry. Same with his mother.
97--> "Did you say... snowballs?"
98** And God help you if you make ''Dee Dee'' seriously angry.
99* ''WesternAnimation/DonaldDuck'': In ''Donald's Better Self'', donald's shoulder angel may be resistant to fighting at first, but as his shoulder devil learns the hard way, even he has his limits.
100* ''WesternAnimation/{{Doug}}'': The sweet-natured titular protagonist also has his limits when he finally has enough. This is best shown in "Doug's Big Brawl" when he knocks out Larry with a powerful right hook after the latter tried to pick a fight with the former over a misunderstanding.
101* ''WesternAnimation/HowToTrainYourDragon'':
102** [[LampshadeHanging Lampshaded]] on ''WesternAnimation/DragonsRidersOfBerk'' by Bucket and Mulch after they see [[GentleGiant Fishlegs]] lecture Snotlout into returning a stolen dragon egg.
103--> '''Mulch''': It's always the quiet ones that snap the loudest.
104** Played straight on ''WesternAnimation/DragonsRidersOfBerk'' when Hiccup, the [[AllLovingHero nicest guy around]], tells Toothless to shoot Alvin at point-blank range for threatening to kill Astrid.
105* In the ''Droopy Dog'' cartoons, the title character is a stoic and monotone character unfazed by any problem. However, if you do something truly petty in cruelty (especially to "The Dame"), he will walk up to you and note in the same monotone, "you know what? [[ThatMakesMeFeelAngry That makes me mad]]." Then he proceeds to demolish you with the same dispassion as before.
106* The [[GentleGiant strong but good-natured Ed]] in ''WesternAnimation/EdEddNEddy'' is normally a GentleGiant who doesn't even get mad when his bossy kid sister Sarah (AKA the "rotten-to-the-core cherished one") abuses his trust. But when he's in a bad mood in the episode "Little Ed Blue", even '''''SARAH''''' is intimidated by him:
107-->'''Sarah:''' You can't kick me out, I live here too!\
108'''Ed:''' So '''''move!'''''
109--> ({{Beat}})
110-->'''Sarah:''' ''([[OOCIsSeriousBusiness visibly frightened]])'' Uh... okay. We'd better go.
111** This applies to ''Jimmy'' in a few episodes. The first one it appears in has him pulling off an extremely complex (and cruel) scheme as revenge against the Eds, [[DisproportionateRetribution all because Eddy gave him a wedgie]].
112** Edd is one of the nicest characters on the show, but test his patience or hurt him in any way and he will use those smarts of his to ''destroy you''. In Big Picture Show, [[BreakTheCutie Edd finally snaps]] [[RageBreakingPoint after a mean prank is pulled on him]]. Ed is terrified, while Eddy goes [[BreakTheHaughty from nonplussed to breaking down in tears]].
113*** Not only that; Edd chews out Eddy for leading them nowhere and being mean to him, and throws him in a fight. And this is coming from a guy who "can't lift a butterfly".
114** In one episode, Edd manages to do this ''completely by accident'', due to a series of accidents and misunderstandings that kept resulting in someone getting hurt. It took a BewareTheNiceOnes moment on Jimmy's part to put an end to it.
115* Elena from ''WesternAnimation/ElenaOfAvalor'' is usually very kind and caring, as expected from a Disney princess. However, at the end of "Song of the Sirenas", she [[spoiler:''murders'' Shuriki]] and [[spoiler:disowns Cristobal after finding out that he betrayed her family for money.]] If you thought that was tame, in "The Magic Within", she [[spoiler:sentences Esteban, her own cousin/adoptive brother figure, to exile almost immediately after finding out he helped Shuriki invade Avalor]].
116--> '''[[spoiler: Cristobal]]''': What? But I'm ''familia''!
117--> '''Elena''': You have no idea what that word means.
118* In ''WesternAnimation/FamilyGuy'', Meg Griffin has been described by Brian as "far sweeter and kinder than the typical American girl" and has [[TheWoobie put up with a]] [[ButtMonkey LOT of abuse]] these past couple of years. However under the right circumstances, Meg could unleash [[UnstoppableRage her repressed rage]] on anyone that [[NotSoHarmlessVillain pisses her off enough]] or have prison life [[TookALevelInBadass turn her into]] [[TranquilFury hardened badass]] [[WhosLaughingNow that her whole family]] [[FromNobodyToNightmare is DEATHLY afraid of]].
119** Stewie also qualifies. He’s been a NiceGuy in the new seasons, but don’t piss him off if you know what’s good for you.
120** Joe too.
121* ''WesternAnimation/{{Futurama}}'':
122** Fry was all mellow while he was fighting with Zoidberg to the death. But when Zoidberg cut his arm off, he screamed "You BASTARD!!! I'll kill you! ''YOU BASTARD!!!"'' and began [[GrievousHarmWithABody clubbing him with the severed arm]].
123*** Nibbler was also on the receiving end of Fry's wrath [[spoiler: when Fry discovered that Nibbler was responsible for Fry's cryogenic freezing back in the year 2000.]]
124---->'''Nibbler''': Then why are you choking me?
125---->'''Fry''': [[PunctuatedForEmphasis Because I don't. Like. Being. Used!]]
126** Kif has the utmost contempt for his commanding officer, Zapp Brannigan, but he usually doesn't express it in any way other the occasional sigh. However upon finding out [[spoiler: he slept with Amy,]] he ended up giving him a well-deserved punch in the gut.
127** Speaking of Zoidberg—aside from the aforementioned incident in which he sliced Fry's arm off with one claw—he willingly caused a war between his homeworld and Earth because he refused to apologize for eating an Earthican flag, and [[LetsGetDangerous nearly dismantled mafia robot Francis "Clamps" Clampazzo]] when he believed the latter was about to kill Bender—[[ItMakesSenseInContext mostly acting out of sheer bottled rage because Clamps had moved in on his turf at Planet Express as the guy who cuts things]], leading to this exchange at the end of the episode when the crew are having pizza:
128--->'''Bender:''' I'll just cut that.
129--->'''Zoidberg:''' YOU DO AND I'LL [[PrecisionFStrike F]]-''[bleep]''-[[PrecisionFStrike ING]] GUT YOU LIKE A FISH!!!
130--->''[Bender sits down, Planet Express crew watches in wordless fear as Zoidberg slowly cuts the pizza with his claw while directing a challenging glare around the table]''
131* ''WesternAnimation/TheGhostAndMollyMcgee'': The eponymous Molly Mcgee is [[ThePollyanna a cheerful, optimistic girl]] who wants to [[PerfectlyCromulentWord "enhappify" her new hometown of Brighton]]. She also gets a little... ''intense'' when faced with injustice and wrongdoing. This probably reaches its peak in the season one finale "Molly vs. the Ghost World", where she uses her aura of pure joy and positivity to [[spoiler: effectively ''kill'' the Chairman and [[HorrifyingTheHorror scare the Ghost Council]] into leaving her and Scratch alone.]]
132* Phineas the Good Wizard is normally a benevolent surrogate father figure to the ''WesternAnimation/LittleWizards'', but when they are threatened, he can be surprisingly fierce. In one episode, he terrifies a pair of trolls who are threatening his wards by transforming Prince Dexter's wooden sword into a terrifying monster that seems ready to genuinely eat them. In another episode, he punishes the Witch of the Petrified Woods after she loses a WizardDuel to him by [[ForcedTransformation transforming her into a monstrous little beast]] and sending her fleeing into the woods [[RumpRoast with magical flames scorching her rear]].
133* Penny Ling from ''WesternAnimation/LittlestPetShop2012''. She's kind, sweet, gentle, sensitive, and painfully adorable. One forgets that despite all that, as a panda, she's ''a bear'' at their own risk -- she's easily the strongest of the pets physically and the most intimidating when she has cause to be, and even [[TheDitz Vinnie]] thinks better of crossing her on the rare occasions she actually gets angry.
134** There's also Sunil, the nicest pet beside Penny Ling, who turns from a LovableCoward into what can be best described as an action hero when confronted with his BerserkButton, cobras.
135* Princess Katherine, from Disney's ''WesternAnimation/{{Gargoyles}}'' series, started out as a brat but ended up essentially giving up her whole world to protect the orphaned gargoyle eggs. Then, when Demona and Theatre/{{Macbeth}} end up [[BrainwashedAndCrazy attacking the young gargoyles]], Katherine grabs [[DarkActionGirl Demona's]] laser-rifle and knocks her out ''with the beam''. To repeat, she ''beat Demona'' in a fight, with a weapon she'd never seen before that night, when she's never been seen fighting on-screen before. Everyone is very impressed.
136-->'''Katherine''': [[MamaBear No one threatens my eggs!]]
137* Zilla Jr. in ''WesternAnimation/GodzillaTheSeries'' is usually content with just lazing about eating fish and swimming in the ocean all day. Harm his "father", Nick Tatapolous, however? Run.
138* PJ of ''WesternAnimation/GoofTroop'' is a NiceGuy and his friend Max and father Pete [[ExtremeDoormat take advantage of him constantly]]. But sometimes people can push him just too far.
139** In "And Baby Makes Three", after being treated like a "feudal serf", he gets back at Pete while [[PaperThinDisguise dressed as a baby]], biting him and deliberately breaking the rules that would upset him the most (because babies don't know any better).
140** He goes through with an extremely passive-aggressive payback another time, "From Air to Eternity", when Pete lies to him about his fear of heights and [[{{Hypocrite}} makes PJ feel guilty for lying (even though he didn't) and being afraid of heights himself]], going out of his way to coerce a confession out of Pete while acting as if he were in life-threatening danger [[PapaWolf (one of the few things that actually worries Pete)]].
141** And in "Queasy Rider", when Max was considering how he would become cool and said he wouldn't forget PJ afterwards in a condescending manner, PJ pulled an overflowing hose trick on Max.
142** In "Winter Blunderland", PJ is the one who says to leave Pete [[ItMakesSenseInContext in his Bigfoot disguise]] for a while longer, pointing out how Pete screwed him and Max over earlier in the episode. Note Pete's gagged and in a big cage surrounded by reporters. Taking pictures.
143* Grim in ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'' is [[DontFearTheReaper the nicest character on the show]], but he's also a nigh-omnipotent RealityWarper with power over who lives and who dies. Heaven help you if you piss him off and aren't [[TheKidWithTheLeash Billy or Mandy]].
144* ''WesternAnimation/HazbinHotel'': Charlotte "Charlie" Morningstar is an incredibly polite and affable lady who always does her best to see the best in people, which is why she's so convinced her plan of rehabilitating a decent number of Hell's sinful population and getting them into Heaven has a plausible chance of working. She's also the ''Princess'' of Hell and thus one of the most powerful demons around. The only reason why the amount of people who take Charlie seriously can be counted on one hand is because she's NiceGirl in a world full of jerkasses who only respect displays of unadulterated power, and it takes ''a lot'' to push her into even showing a small fraction of her full abilities.
145* ''WesternAnimation/HeyArnold'':
146** Arnold tries to see good in everybody and is always willing to help someone out. If you're beyond reforming, he will not hesitate to let you know. The maddest Arnold has ever been was most likely when he helped [[LazyBum Oskar Kokoshka]] get a job as a newspaper deliveryman only for the latter to [[PlayingSick feign illness to get out of it and manipulate Arnold into doing it for him twice in a row]]. [[TheReasonYouSuckSpeech Arnold told Oskar he was a "huge loser" while calling him out on his lies]].
147** There’s also the episode “Arnold Betrays Iggy” where Arnold accidentally reveals that Iggy wears bunny pajamas at home and the poor guy does his best to make up with Iggy. Iggy’s selfish and resentful attitude eventually leads to Arnold humiliating himself in public. This leads to the roles being flipped with Arnold resenting Iggy and Iggy, after realizing who really revealed his secret, desperately trying to make up with Arnold. Unfortunately, the damage he caused is too great and Arnold wants nothing to do with him anymore.
148* Sweet, innocent, adorable little Ding-A-Ling Wolf from the Creator/HannaBarbera ''WesternAnimation/HokeyWolf'' cartoons. One time he beat the living crap out of a KillerRobot with a HUGE CLUB because the robot was strangling Hokey.
149* "Pepper" Potts from ''WesternAnimation/IronManArmoredAdventures''. That's probably one of her trademark aspects of her personality (aside from her MotorMouth that is.) Normally, this girl is goofy, bubbly, and talkative, but if the situation calls for it, she shows a somewhat violent side of her. An example of this is when she mentions offhand to Gene that she got a guy deported for espionage. When the [[spoiler:armor designs are stolen and sold to Stane and Hammer, Pepper suggests Tony steal them back or trash their companies trying amidst various angry growls]].
150* GIR of ''WesternAnimation/InvaderZim'', though more selfish and self-centered than most examples, is a sweet [[GenkiGirl Genki Guy]] of a robot with an obsession for fast food and small animals, but when in "duty mode", he becomes a frighteningly efficient minion of TheEmpire. Mercifully, it usually only lasts for a few seconds, but on the one occasion he was locked in this mode not only did GIR accomplish more in ten minutes than Zim had over the entire series, it almost killed him.
151* ''WesternAnimation/{{Invincible}}'': Mark is a kind young man who rarely takes himself too seriously, and is [[WillfullyWeak constantly holding back his true strength]] for fear of hurting anyone. He manages to keep his kindness for the most part despite going through numerous horrifically traumatic events, but he eventually snaps in the second season finale when [[spoiler:his ArchEnemy Angstrom Levy takes his family hostage and brutally breaks his mother Debbie's arm. In a fit of rage, Mark savagely beats Levy to death, much to his own horror.]]
152* ''WesternAnimation/{{Jellystone}}'': In this series, {{WesternAnimation/The Funky Phantom}} is a former wrestler who is genuinely flattered and impressed by Huckleberry Hound's admiration of him, despite his last match ending in a career-ending loss. Then we learn exactly ''why'' Funky Phantom lost his last match: he became overwhelmed by competitive spirit and used his ghost powers to possess his opponent and ''mangle him from the inside out''. He almost does the same thing to Yogi during Huckleberry's Jelly Wrestle Rumble.
153** On his own series from 1971, the erstwhile Jonathan Muddlemore was a craven coward for a ghost but he delivers when Skip, Augie and April are in a pickle.
154* Stormer from ''WesternAnimation/{{Jem}}'' is known as the nicest member of her band but when provoked has some bite to her. She utterly insults Kimber in "The Bands Break Up", likely due to her poor mood after feeling disrespected by her bandmates, and overall goes with whatever trouble The Misfits do.
155* ''WesternAnimation/TheJetsons'': In "Hi-Tech Wreck", George Jetson and his family are [[ReassignedToAntarctica shipped off to Outer Moongolia]] after a DisastrousDemonstration. Knowing the demonstration wasn't George's fault RUDI, the normally mild-mannered AI that runs the Spacely Sprockets factory, refuses to cooperate with Mr. Spacely and ends up threatening to send the factory into meltdown if he doesn't give George his old job back.
156* Dukey from ''WesternAnimation/JohnnyTest'' can kick serious butt if pushed too far. After all, he destroyed a FRIDGE with a flying kick in one episode.
157* Given the fact that WesternAnimation/{{Kaeloo}} can [[HulkingOut Hulk Out]] when angered, it's best not to make her angry.
158* Mitsuki from ''WesternAnimation/KappaMikey'' is generally good-natured and level-headed to the point of ridiculousness, given what goes on around her every episode. But she can be shockingly devious when the situation warrants it, and she knows her cast-mates frighteningly well. So far, only Lily and Gonard have been unfortunate enough to provoke her ire. Unusually for this trope, she got her revenge without resorting to violence; especially considering Mitsuki is a retired spy and knows such things as how to kill a person with one touch.
159** In one episode, Lily's computerized vanity put a pretty big bull's-eye on her head.
160** In another, Gonard's [[AnnoyingPatient faked-injury ploy]] was easily turned against him.
161** She shows off her bad side more effectively in the episode where the guy in the mailbox suit tries to get her to re-join the agency.
162* ''WesternAnimation/KimPossible'':
163** Ron Stoppable. He's a generic goofy sidekick that mostly gladly acts as a distraction, but if you get him pissed off, either by hurting Kim or boasting about destroying Bueno Nacho, he gets in such a Mystical Monkey Rage that he will kick your ass. On the two occasions that he goes evil even [[TheDragon Shego]] is afraid, and the only major villains on the show to have been KilledOffForReal are Warhok and Warmonga. Why? They threatened to kill Kim, and keep her corpse as a trophy ''in front of Ron''. Do that, and you're in REAL trouble.
164** Kim herself is usually pretty pleasant even to her villains, joking good-naturedly as she rounds them up again. But push her too far and... well, it's not pretty, as [[AlphaBitch Bonnie]], [[NotSoHarmlessVillain Drakken]], and [[DarkActionGirl Shego]] have all found out.
165* From ''WesternAnimation/TheLegendOfKorra'', we have:
166** Jinora, Ikki, and Meelo, Tenzin's Airbender children. They start out as really sweet kids, if a bit annoying, until "Turning The Tides". Simply put, [[spoiler:when Amon and his forces tries to invade Air Temple Island, the kids combine TheCavalry, BigDamnHeroes, and LetsGetDangerous to protect Lin and Air Temple Island from Amon's second-in-command, the Lieutenant, and a ''shitload'' of Equalists.]]
167** Tenzin, personality wise, is a lot like his mother Katara without the temper. He's the sweet-natured TeamMom of the series. But don't forget he spends most of the series as the ''only'' Airbending master in the world taught exclusively by his Avatar father. It's quite clear in his fight against Zaheer that the latter is seriously outclassed.
168** Asami looks and acts like the high-class lady she is, but piss her off and you'll find out why her father had her learn martial arts at a very young age. She also has Sokka's technological gift behind her, and thanks to her father's corporation she can almost instantly learn how to pilot anything in the series. [[spoiler: Hiroshi is the villainous example from the family, as he is possibly the most supporting father anyone can wish for, but beneath all that lies a vengeful and hate-filled soul that will even go as far as to ''kill his own child'' to get his revenge.]]
169** Suyin is the supportive and kindhearted matriarch of Zaofu, proving to be a great ally to Korra and her friends. Even when confronted with Lin's escalating antagonism, she still keeps a level head and is willing to mend bridges with her. But when someone betrays her trust or threatens her family, Su shows no mercy and is almost eager to see them suffer.
170* ''WesternAnimation/LooneyTunes'': "Of course you realize, this means war!". Practically it was the case with the whole cast, but WesternAnimation/BugsBunny made it his catch phrase.
171** One of the best Bugs examples comes from ''WesternAnimation/LongHairedHare''. Bugs is uncharacteristically patient with Giovanni Jones at first, choosing to live and let live until the pompous {{Jerkass}} had beaten him up ''three'' times. At that point, the gloves come off and he tricks Giovanni into holding a high note for so long that he almost suffocates, which then [[LiteralMetaphor quite literally brings down the house]].
172** Porky Pig, in ''WesternAnimation/TheLooneyTunesShow'' is an ExtremeDoormat, letting most people, especially Daffy, take advantage of his nice-guy persona. Even going so far as to give Daffy all of his money so Daffy could have a kidney transplant. But when Bugs revealed to Porky that Daffy lied and used all the money to buy a yacht, an enraged Porky beat the ever-living crap out of him.
173** In the original shorts, Porky was a nice, patient everyman whose patience had limits.
174** Granny is normally a sweet old lady, but she is also quite protective of Tweety, as Sylvester can attest. In ''WesternAnimation/TheLooneyTunesShow'', she also punches Daffy in the stomach after reading a nasty, hate-filled email from him.
175* ''WesternAnimation/TheMagicSchoolBus'': Phoebe is arguably the kindest and most sweet natured one in the class, but when pushed a little too far, she will snap.
176* ''WesternAnimation/TheManyAdventuresOfWinnieThePooh'': The sign on Piglet's house that reads "Trespassers Will [[spoiler:[[FridgeHorror Be Shot!!!]]]]" To be fair, the house belonged to his grandfather (Piglet assumes, due to SignsOfDisrepair, that Trespassers Will is his grandfather's name), but assuming Piglet's family has the same disposition as him, it's still rather surprising.
177* ''WesternAnimation/MegasXLR''. Coop is a nice, easygoing guy who enjoys all things food. Threaten his friends, insult his robot, or deny him a Megaslush, and he becomes an outright berserker. Pretty much every villain was stupid enough to hit at least one.
178* In one episode of ''WesternAnimation/{{Metalocalypse}}'', Toki Wartooth had been pestered by a fan who kept shouting in his face during a show. He grew infuriated and pummeled (possibly even killed) the guy to no end. Even Murderface, who was going to kill him for taking his domain page name, [[https://www.youtube.com/watch?v=80IORg9r6Ek quickly changed his mind]].
179** This was foreshadowed in Dethdad. [[spoiler: Senator Stampington explains Toki's pent-up aggression and flat out says "Toki Wartooth will kill us all."]]
180* The primal example: WesternAnimation/MickeyMouse, though the classic nice guy and often rather hapless in gag situations, is nevertheless a force to be reckoned with when pushed too far. Originally, the entire point was that you didn't expect to see a lovable guy like Mickey in a battle royale, so the sight on its own was funny.
181** Today in ''Franchise/KingdomHearts'' he's a dynamic fighter in dramatic situations, and often bears the title ''King'' Mickey, earning it via ass-kicking.
182** In the older cartoons, before he gets significantly watered down to TheGenericGuy of the group, he's just as aggressive as WesternAnimation/DonaldDuck when pushed to the limit - such as in the 1942 short "WesternAnimation/SymphonyHour", where he ultimately [[http://images2.fanpop.com/image/photos/11400000/Symphony-Hour-mickey-mouse-11499650-300-219.jpg pulls a pistol(!)]] on Donald when the duck tries to skip out on a concert GoneHorriblyWrong. Notably this is the last time until ''WesternAnimation/HouseOfMouse'' we see this side of the mouse.
183** How about in ''WesternAnimation/{{Fantasia}}'', where the innocent Sorcerer's Apprentice brings his broom to life, finds that it is doing its job [[GoneHorriblyRight a little too well]], and attempts to rectify the situation... by brutally chopping it to smithereens with an axe. [[GoryDiscretionShot We only see their shadows on the wall...]]
184* ''WesternAnimation/MiraculousLadybug'': Luka Couffaine is one of the nicest, most laid-back characters on the show, but that does ''not'' mean you should try to provoke him. Best case scenario, he'll yell at you; worst case scenario, [[BigBad Hawk Moth]] will find out and turn him into his latest akumatized supervillain. The latter ended up happening in "Silencer", when a CorruptCorporateExecutive plagiarized his band and threatened his crush.
185* Posey in ''WesternAnimation/MissionHill'' may be the resident pacifist and airy GranolaGirl, but she can be made rather sadistic when [[KarmicProtection insulted and her friends threatened.]] Read the exchange quote in this articles' [[Quotes/BewareTheNiceOnes Quotes page.]]
186* ''WesternAnimation/MyLifeAsATeenageRobot'': X-J9, aka Jenny is very sweet and prefers to live like a normal teenager instead of saving the world. She even ignores (mostly) the school {{Alpha Bitch}}es who constantly try to ruin her. But underneath that is a robot with tons of weaponry that can take on an ''entire alien invasion'', so don't threaten her, her friends, or the human race.
187* In the ''ComicStrip/{{Peanuts}}'' special ''WesternAnimation/WhyCharlieBrownWhy'', Linus befriends a girl named Janice who suffers from leukemia. The normally kind-hearted Linus meets his sister Lucy's ignorance and insensitivity with TranquilFury. Later, when a bully steals Janice's hat (which is concealing her hair loss from chemotherapy) and makes fun of her, Linus loses it completely and [[TheReasonYouSuckSpeech viciously tells the bully off]].
188* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
189** Fluttershy:
190*** Fluttershy is the nicest character around -- too nice, in fact, timid and prone to let others push her around. She almost never gets angry... and you'll already have guessed this entry is about those times that necessitate the "almost" in that sentence. Hurting or threatening her friends can make her angry enough to forget to be afraid and instead bring out a will strong enough for StaringDownCthulhu. At least then she's still being good, just extremely stern. But a momentary nervous breakdown she suffers in one episode when her ability to befriend animals inexplicably fails causes her to snap and go berserk hunting the animals. ("You are going to LOVE ME!") And bad assertiveness training in another episode turns her temporarily into a highly effective bully. This is ironic in itself because she could already at best be genuinely assertive enough to make a dragon stop attacking and start crying just by talking to it, and it makes perfect sense when you see it. She also did the same to a cockatrice, threatening to tell on its mother and a swarm of bees who tried to attack a [[OurFairiesAreDifferent Breezie]].
191*** And then there's the episode "Power Ponies", where the Mane 6 and Spike enter a comic book world and become superheroes. [[ComicBook/TheIncredibleHulk Guess which superhero]] Fluttershy becomes a parody of.
192*** There's also the fact she effectively pulls a NoSell to the spirit of chaos itself, forcing him to use a crude override to control her briefly. And then she wears down the ''same'' spirit of chaos and forces him to comply with her wishes using nothing more than prolonged kind and gentle treatment.
193** Celestia:
194*** Normally, [[PrincessesRule Princess]] [[GodEmperor Celestia]] is very calm and collected, and seems to enjoy having a little fun with her subjects now and then. Then we have the first part of "The Return of Harmony", where she smacks the villain with a ShutUpHannibal TWICE, and then tells him point-blank to quit screwing around and answer her questions. He begrudgingly tosses out a riddle and leaves before she can grill him any further. It's one of the few times she's ever been seen not only genuinely angry but faced with someone who outright ''defies'' her and seemingly gets away with it.
195*** In the Season 2 finale we finally see Celestia fight, complete with PreAsskickingOneLiner. [[spoiler:True, [[TheWorfEffect she loses]], but that surprised EVERYONE, including the villain]].
196*** In the Season 3 opening episode, we see Twilight entering the main room of the Canterlot Castle, only to find a ''very pissed off'' Celestia, going as far to practically bring Twilight Sparkle to TEARS. Granted, it's just Sombra's dark spell creating an illusion, but still... assuming that's how she really sounds when angry, it makes you want to NOT anger the Demigod in the first place.
197----> '''Princess Celestia''': It doesn't matter to me, ''[face turns to Twilight, angered]'' you ''FAILED'' the test, Twilight!
198*** Flashbacks of Celestia in the Season 4 opener also show a few of the other times in her past where she's had no other option to deal with rampaging magical beings except to (sometimes reluctantly) fight them, a reminder that she's the ruler of Equestria for a darn good reason.
199*** Celestia is usually calm and nice to all her subjects, but even she has limits on what she can tolerate. When [[spoiler:Starlight Glimmer switches the cutie marks of her and her sister Luna so they could understand each other better]] she was [[TranquilFury barely]] able to keep her rage contained until the situation was explained and Starlight is proven right.
200*** When push comes to shove, she has no problem whatsoever throwing a child in [[DraggedOffToHell Tartarus indefinitely to rot]] or [[TakenForGranite sealing them in stone for all eternity]] with absolutely no regret, guilt, or hesitation if [[GodzillaThreshold they're enough of a threat]] and/or [[BeyondRedemption not worth trying to redeem]].
201** Twilight Sparkle is the poster mare for adorable awkwardness and NoSocialSkills, whose passion for knowledge is only challenged by her desire to be a good friend. She's also the most powerful unicorn in Equestria with an ''incredible'' well of magic at her disposal, and is entirely capable of unleashing the hurt on anypony she desires. "Lesson Zero" even shows that she's just as capable of sowing chaos and disharmony as Discord.
202** You'd think that the [[ThePollyanna perpetually cheerful]] GenkiGirl with borderline RealityWarper powers would be an excellent candidate for this trope, but Pinkie Pie repeatedly subverts it. In "Griffon the Brush Off", her reaction to proof that Gilda is a grade-A jerkface is to throw her a party, because she thinks Gilda is just stressed and needs to unwind. In "Party of One", when she thinks her friends have abandoned her she avoids them altogether and throws her own party with various {{Companion Cube}}s, in stark contrast to the far more destructive {{Sanity Slippage}}s of Fluttershy and Twilight. And when Applejack breaks a Pinkie Promise in "The Last Roundup" she [[https://www.youtube.com/watch?v=8O9HVV-vPMM breaks out the scary voice]], leads a pursuit across the desert, and when she finally catches her she... demands Applejack apologize. That said, she does handle herself competently in a brawl when the group gets into fights.
203** Big Macintosh is a [[GentleGiant large yet soft-spoken]] pony who fairly calm in most of his appearances. The times he's gotten mad on the show can be counted on one hand. The one time he did angry he gave quite a stern lecture.
204** Princess Cadance [[spoiler:(the real one)]] is a kind and sweet LoveGoddess and used to work as a babysitter. [[spoiler:However, when she is kidnapped and her husband-to-be is about to marry her evil double, she shows nothing but [[{{Determinator}} determination]], repeatedly defies the changeling queen (even after said queen defeats [[PhysicalGoddess Princess Celestia]]), and then helps deliver the HeartBeatdown that blows the changelings ''across the continent''.]] Then in the Season 3 opener she maintains a field of light and love around the Crystal Empire that manages to keep King Sombra, a unicorn EvilOverlord that took both her aunts to defeat the first time, out for what was likely ''days''. This, combined with his horrific treatment of his [[SlaveRace subjects]], leads to her [[spoiler:setting up another love-powered WaveMotionGun and telling his subjects DoWithHimAsYouWill. The end result is King Sombra being ''[[LiterallyShatteredLives obliterated]]''.]]
205** Rarity is Element of Generosity, an empathetic and helpful friend, and TheFashionista (and a DramaQueen and LargeHam besides) with some rather stereotypically girly/princess-y behavior, but she has been seen spin-kicking ''Applejack'', far and away the strongest of the Mane Six, uppercutting Changelings, kicking a manticore in the face, and bodily threatening adolescent dragons who dare to threaten Spike.
206** Spike as well. Yeah he's passive, a bit cowardly, and kind of a ButtMonkey, but he's still young. He's also a ''dragon'' though, and when put on the spot he'll think nothing of jumping between his friend and a gigantic plant monster (and ''winning'') or saving countless lives from a massive falling hunk of ice.
207** ''[[Recap/MyLittlePonyFriendshipIsMagicS4E26TwilightsKingdomPart2 Twilight's Kingdom Part 2]]'': Twilight goes absolutely ''berserk'' when Tirek destroys her home, unloading on him with everything she's got. When you get down to it, Tirek's final fate is to get ''[[DraggedOffToHell blasted to hell.]]''
208** Twilight's older brother Shining Armor as well. A laid back, jovial stallion who is a fantastic older brother, husband and new father. But threaten his loved ones or his country, and you'll get a first hoof lesson of why he was chosen to lead Celestia's guards.
209** Thorax is a kind changeling who just wants friends and usually comes off as shy and can be easily scared. Even after [[spoiler:he becomes King of the changelings after Chrysalis is overthrown]] he becomes a GentleGiant and is still shy and easily embarrassed. But, if he believes that anyone is threatening his friends, especially his best friend Spike, he will not hesitate to drop the pleasantries and change into a giant bear.
210--->'''Thorax''': Hey! No one yells at my friend!
211** [[ExBigBad Sunset Shimmer]] was originally a vicious bully. Despite turning over a new leaf and becoming a better person, there are still instances where she can be vicious when pushed too far. When the VillainOfTheWeek erased everyone's memories of Sunset's reformation, and declared she would always be remembered as being mean, Sunset menacingly replied,"You're about to see how ''mean'' I can get!," and was only held back by Trixie.
212** In "[[Recap/MyLittlePonyFriendshipIsMagicS8E23SoundsOfSilence Sounds of Silence]]", Applejack and Fluttershy meet the kirin, a magical race renowned for their kindness and compassion. [[YouWouldntLikeMeWhenImAngry They transform into flaming demons called nirik when angry]].
213** In "[[Recap/MyLittlePonyFriendshipIsMagicS8E25SchoolRazePart1 School]] [[Recap/MyLittlePonyFriendshipIsMagicS8E26SchoolRazePart2 Raze]]", [[spoiler:[[FaceOfAnAngelMindOfADemon Cozy Glow]]]] learns the hard way that while the princesses are all about {{Forgiveness}} and ThePowerOfFriendship, none of them will hesitate to condemn even [[spoiler:''a foal'']] to [[DraggedOffToHell Tatarus]] if they perform a serious act of treason against Equestria [[note]] Not even Princess Twilight or Princess Luna, the ones you'd most likely expect to disapprove given that the former is a major "TurnTheOtherCheek" pony while the latter is a FriendToAllChildren; In fact, Luna is actually the one who oversees the incarceration [[/note]]. This also applies to everybody else in that episode, because ''nobody'' protests that punishment.
214* ''WesternAnimation/PhineasAndFerb'':
215** "Summer Belongs to You" has the moment where the optimistic and mild-mannered Phineas loses his temper for one of the few times on the show and yells at Candace to [[ItMakesSenseInContext "GET ON THE TRIKE!"]]
216** If he has reason to believe you have been responsible for causing harm to someone he cares about, Phineas will call you out in [[TranquilFury a quiet voice that is somehow more terrifying than if he were screaming]].
217* ''WesternAnimation/ThePowerpuffGirls1998'':
218** When the usually sweet [[ThePollyanna Bubbles]] is sufficiently provoked, she's been shown to eclipse ''both'' of her sisters Blossom and Buttercup in terms of raw anger and violence. Every single one of her emotions is taken to the extreme: When she's happy, she's bursting with euphoria, when she's sad, she loses all will to live, when she's afraid, she's paralyzed by fear, when she's tired, she falls into a deep sleep. So, naturally, when she's angry, she is rage incarnate. Mojo Jojo learned this last one the hard way. This goes back to her ''very first appearance'', when Fuzzy Lumpkin's "meat gun" turned one of Bubbles' ponytails into a drumstick. Cue asskicking.
219** The Professor also counts. He’s a nice, laid back guy, but if you know what’s good for you, [[PapaWolf DON’T harm his girls.]] Mojo Jojo nearly learned this one the hard way as well, although it was cut short [[spoiler:by everyone realizing Mojo caused Chemical X to be mixed in with the girls' sugar, spice, and everything nice.]]
220** There’s also Ms. Bellum, a calm secretary, who ends up ''beating Sedusa in a fight!''
221** Blossom. She is friendly, calm, and sweet, but she's amazing at kicking bad-guy buttocks. Also, in "Slave The Day", after trying to set aside her discomfort of having Big Billy around the Utonium household, justified given his history with the Gangreen Gang, Blossom eventually snaps at Big Billy for ignoring the Girls' warnings not to help, since it had made things worse and much more difficult for them to fight crime.
222* ''WesternAnimation/RickAndMorty'': Morty is a nice, inoffensive kid and in fact [[ExtremeDoormat a bit of a pushover]], but the few occasions he's snapped have always been dramatic. Example A, when the Jellybean King [[spoiler:tried to rape him]], Morty utterly lost it and beat him nearly to death. Example B, at one point near the end of the Season 3 premiere he actually [[spoiler:pulls a gun on]] Rick and threatens him. The biggest example of all though is in "Look Who's Purging", where they visit a planet of medieval {{Funny Animal}}s who [[Film/ThePurge undergo a yearly Purge]] - Morty [[spoiler:dons a suit of PoweredArmor and begins mercilessly killing scores of villagers, even ones that are just trying to hide and run away from him. Even [[HeroicComedicSociopath Rick]] is left quietly mortified and freaked out. Rick's line about "a cocky Morty leading to problems that would be bad for everyone" and the introduction of Evil Morty also show the kid is capable of going FromNobodyToNightmare ''big-time'' if it's allowed.]]
223* The rather obscure cartoon ''WesternAnimation/RobotAndMonster'' featured an example of this in its Christmas special---one scene showed the titular characters' families beating the shit out of each other, and when Gart defeats his brother Robot, Globitha (who [[spoiler:has a crush on Robot]]) sees this as an opportunity to go commando on Gart and literally destroy him.
224* The title character from ''WesternAnimation/RockosModernLife'' hits his limit at the end of "Rocko's Happy Sack", when he's been through hell and back to get his grocery shopping done and missing the 99% off sale and given the total of $150.
225--> '''Rocko''': You cheap little rotter! I've been run over by a car, made to carry around a gimp shopping cart, threatened by your gestapo security guards, had me head set on fire, I was attacked by giant lobsters, beaten by a very large woman, had me dog wrapped in plastic, nearly starved to death, and I still made the twelve o'clock deadline! So if you don't change that total back to $1.50, [[AC:'''''I WILL DO SOMETHING NOT NICE!!!!!!!!!!!''''']]
226--> '''Filburt''': That'll be one dollar and fifty cents, please.
227* Menacing Woofer and Wimper was a good way to get WesternAnimation/ClueClub's sweet, precocious computer whiz, Dotty, riled up.
228--> '''Dotty''': If you clobber my dogs with that hose, I'll turn you into monkey stew!
229* ''WesternAnimation/Rugrats1991'': Chas Finster may be a nervous and awkward NiceGuy like his son Chuckie, but he knows when he's had enough. In "[[Recap/RugratsS2E10ReptarOnIceFamilyFeud Family Feud]]", Stu and Didi are having a petty feud with Howard and Betty, both factions hating and insulting each other with poor Chas stuck in the middle and unable to make them calm down and reconcile. Near the end, the babies have wandered off (as usual) and when the families do nothing about it but argue some more, Chas is [[RageBreakingPoint absolutely]] ''[[RageBreakingPoint furious]]'' and calls them on their childish behavior, bringing them all to shame and ending the feud. As he delivers his [[TheReasonYouSuckSpeech reason-you-suck speech]] to them all, he even sounds like he's ''[[BerserkerTears crying]]''!
230-->'''Chas:''' Look at you! Don't you see what you've done?! While you've been insulting each other and bringing up every petty difference from your past, you've forgotten about your children, the most important thing in your insignificant lives! ''(starts crying)'' You ought to be ashamed!
231* Sorrowful from ''WesternAnimation/SheRaPrincessOfPower'' is normally a rather cowardly, soft-spoken creature, much to other characters' surprise when they first meet him. He is still, however, a full grown dragon and, when his anger is aroused, can repel cannon fire, toss aside tanks, and tear through armor like tissue paper to [[HilarityEnsues deliver an angry lecture on just how bad he finds the villains' behavior.]]
232* Marge, the endless suffering matriarch of ''WesternAnimation/TheSimpsons'' family, has snapped on a few occasions when Homer screwed up once too many (especially in TheMovie).
233** In [[Recap/TheSimpsonsS10E15MargeSimpsonInScreamingYellowHonkers one of the episodes]], one of the Simpsons gets road rage. Hint: It's not Homer.
234** [[MamaBear And don't even think about harming one of her kids.]]
235** Ned Flanders started off as the nicest person in Springfield. Then we find out he's been repressing for twenty [[{{Retcon}} (or was it fifty?)]] years, and when he finally snaps [[ReasonYouSuckSpeech he chews out the townsfolk for being incompetent, selfish, annoying, obnoxious and all round horrible people.]] It all goes down after the town pitches in to build him a new house and fails miserably when it collapses in "[[Recap/TheSimpsonsS8E8HurricaneNeddy Hurricane Neddy]]".
236---> '''Ned''': ...And if you really tick me off, I'm gonna run you down with my car.
237*** In "[[Recap/TheSimpsonsS5E5TreehouseOfHorrorIV Treehouse of Horror IV]]", Flanders was Satan. In his own words, "It's always the one you least suspect."
238*** In "[[Recap/TheSimpsonsS9E6BartStar Bart Star]]", he even managed to intimidate Homer after the latter threw a full can of Duff at him while he was trying to coach.
239** PlayedForLaughs in "[[Recap/TheSimpsonsS4E22KrustyGetsKancelled Krusty Gets Kancelled]]". Creator/BetteMidler [[NatureHero enforces the cleaning of America's freeways and opposes littering]] [[BerserkButton very zealously.]]
240** In "The Saga of Carl", Carl bails on Homer, Lenny and Moe with the winnings from their shared lottery ticket. While Moe is convinced he's backstabbed them and Homer is unsure, Lenny remains steadfastedly loyal and insists that there must be a good reason for his actions. When they finally catch Carl, he admits that he already spent the lottery money. When they ask how he could treat his friends that way, Carl declares that while they hang out together, [[KickTheDog he's never considered them friends.]] A devastated Lenny replies, "Y'know, I'm glad we ain't friends, Carl - ''so I don't have to feel bad about doin' this to ya!''", and giving him a furious beating. As they watch, Moe comments to Homer that "it's always beautiful when the nice ones snap."
241* In the ''WesternAnimation/SonicBoom'' episode "Just A Guy", after spending the entire episode being ostracized by his friends for saving the villager's lives and [[DudeWheresMyRespect getting absolutely no respect for it whatsoever]], Sonic finally snaps and delivers an ''epic'' rant against them before [[TenMinuteRetirement quitting the hero business altogether]]. He almost sounds [[TryingNotToCry on the verge of tears]] as he delivers the WhamLine at the end.
242--> '''Sonic:''' You know what ''I'' think is compassionate? Saving the village from Eggman! Like, every week! But do I get any props for that?! NO! Everyone just goes around GASPING at me for calling a guy ''"a guy,"'' or people ''"people!"''
243--> ''(Everyone gasps)''
244--> '''Sonic:''' '''[[SuddenlyShouting I QUIT HEROING, AND I QUIT THIS STUPID GROUP!!!]]''' ''(storms out in a huff)''
245* ''WesternAnimation/SouthPark''.
246** Butters has many, ''many'', moments where you learn he is not be trifled with.
247*** Stan's [[WhatTheHellHero exploiting]] of [[spoiler:his grandmother]]'s [[TheBully bully]]ing of him in "[[Recap/SouthParkS16E5Butterballs Butterballs]]" eventually causes him to [[spoiler:punch out Dr. Oz on national television.]] He then gives a massive TheReasonYouSuckSpeech [[spoiler: to his grandma about her own morality]].
248*** In "[[Recap/SouthParkS8E5AWESOMO AWESOME-O]]", Cartman pretends to be a cool robot in order to con Butters. When Butters finds out, he reveals he taped one of Cartman's own embarrassing moments, and shows it to everybody.
249** As proven in "[[Recap/SouthParkS1E11TomsRhinoplasty Tom's Rhinoplasty]]" -- Don't fuck with Wendy Testaburger!
250** Pip when called "French" in "[[Recap/SouthParkS2E5ConjoinedFetusLady Conjoined Fetus Lady]]".
251** In later seasons, Liane increasingly refuses to put up with Cartman's abuse, and eventually ''pulls a gun on him'' in order to get him to go to bed, to the latter's shock.
252* ''WesternAnimation/TheSpectacularSpiderMan'': Just like the comics, Spider-Man is an example.
253* ''WesternAnimation/SpongeBobSquarePants'':
254** The title character is typically extremely tolerant and obnoxiously optimistic. However, in [[Recap/SpongeBobSquarePantsS3E7AsSeenOnTVCanYouSpareADime "Can You Spare A Dime?"]] Squidward resigns from his job and ends up homeless as a result. [=SpongeBob=] finds him and takes him into his home until he can find a new job. He takes it too far and stays a lot longer than necessary, turning [=SpongeBob=] into his personal slave (even forcing him to wear a ''[[DraggedIntoDrag maid's uniform]])''. While [=SpongeBob=] doesn't completely lose his temper, he snaps a bit and drops some '''very''' obvious hints that Squidward should go look for a job already. Squidward still doesn't get said hints (or, more likely, deliberately chooses to ignore them), so [=SpongeBob=] ''furiously'' takes Squidward, still in bed, all the way to the Krusty Krab. He tries to convince Mr. Krabs to hire Squidward back, and when that didn't work, the sponge finally snaps, outright ''strangles his boss'', calls him a cheapskate, and finally yells at him on how stupid the situation is (which in turn causes the first dime to appear -- [[ShaggyDogStory it was in Mr. Krabs' pocket the whole time!]]). It shows that even ''[=SpongeBob=]'' [[RageBreakingPoint has his limits...]] and it used to be the page image for a ''good'' reason.
255--->'''Spongebob:''' Listen, you crustaceous cheapskate! Squidward's been living at ''MY'' house, driving me crazy! '''AND YOU'RE NOT GONNA HIRE HIM BACK ''ALL BECAUSE OF A STUPID DIME!?!??!?'''''
256** In "Krusty Love", after Mr. Krabs has alternated between [[LoveMakesYouDumb demanding very expensive gifts for Mrs. Puff]] and berating him for spending so much money, [=SpongeBob=] snaps and rants at Krabs for a bit using [[{{Angrish}} some apparently-colorful language]]. Mrs. Puff acts shocked and has to look up a word, and when he finally storms off Krabs is left with jaw inches from the ground.
257** Mrs. Puff in "Demolition Doofus" where after [=SpongeBob=] punctures her inflation sac, she tries to '''murder''' him (no joke).
258** [[FluffyTheTerrible Puffy Fluffy.]] ''Do not'' put him in a house with another pet.
259** In "The Cent of Money", Mr. Krabs discovers that Gary is good at finding cash, and [=SpongeBob=] explains that it causes Gary great discomfort. Mr. Krabs ([[{{Greed}} being Mr. Krabs]]) decides to [[BadPeopleAbuseAnimals exploit this trait]] while keeping [=SpongeBob=] occupied at the Krusty Krab. But when he finds out what's really going on, he is ''pissed'' and calls Mr. Krabs out on his deplorable behavior.
260** Sandy Cheeks. She's one of the nicest characters in the series, but she is also one of the strongest, and pissing her off is ill-advised. "Texas"[[note]]Where she chases [=SpongeBob=] and Patrick with a lasso after they insult Texas (if only to try to convince her to stay in Bikini Bottom)[[/note]] and "Survival of the Idiots"[[note]]Where she, after becoming humongous due to hibernation, beats [=SpongeBob=] and Patrick ([[ItMakesSenseInContext thinking them to be Pinhead Larry and Dirty Dan, respectively]]) after they inadvertently disturb her rest while playing outside her tree; she wakes up later in the episode and notices they stole her fur, then decides that ''they'' would be her fur[[/note]] demonstrate this trope best.
261* ''WesternAnimation/StarTrekLowerDecks'' gives us Ensign Bradward Boimler. Most of the time, he's a grade-A ass-kisser who ScreamsLikeALittleGirl at the sign of danger and all he wants to do is move up in the ranks in Starfleet. But, the man has ''limits''. In the episode "Reflections", after enduring various hecklers while trying to stop [[MilitaryMaverick fellow Ensign Beckett Mariner]] from doing something stupid, a pair of scientists mock the Starfleet uniform, steal away his rank pip (which gets stepped on) and laugh in his face. He goes completely ''apeshit'' on them and everyone else.
262** And then there's Ensign D'Vana Tendi: bubbly, cheerful, sweet and nerdy. Will steal your teeth if you get in her way.
263* ''WesternAnimation/StarWarsRebels'' gives us Jedi Knight and TeamDad to the Ghost Crew [[BrokenAce Kanan Jarrus]]. He is usually friendly and tries to do his best to keep the team together, but may the Force REALLY be with you if you hurt someone he cares about. No, really. Just ask the burnt remains of [[TheHeavy the Grand Inquisitor]].
264-->'''Kanan:''' That was a mistake.\
265'''The Inquisitor:''' Why? Because you have no one left to die for you?\
266'''Kanan:''' No. [[NotAfraidOfYouAnymore Because I have nothing left to fear]].
267** Hera is another example. She's very compassionate and dedicated to the cause, and acts as the TeamMom and moral center of the group. However she does have a fearsome temper (just ask that ship she blew up [[MamaBear for hacking her droid]]) and her dedication often makes her TheUnfettered, able to sacrifice anything and everything for what she believes in.
268* ''WesternAnimation/StevenUniverse'': Steven is an incredibly laid-back, polite, dorky, AllLovingHero. It takes a ''lot'' to piss him off, but he will let you know it.[[spoiler: He yells at and argues with Pearl for not believing him about the mysterious things in the warp stream]], [[spoiler: he throws a tantrum over Ruby and Sapphire's bickering]], and [[spoiler: when he thought that Peridot was going to sell out the Crystal Gems to Yellow Diamond, he steals the Diamond communicator, locks her in a truck, and angrily tells her off before ratting her out to the Crystal Gems]]. In "Beach City Drift" [[spoiler: he expressed his first case of outright ''hatred'' when [[SmallNameBigEgo Kevin]] started violating his, and [[FriendlessBackground (especially)]] [[ShrinkingViolet Connie's]] personal space when they were fused as Stevonnie. He spends most of the episode irritable and pissed off after encountering Kevin again at the start, and finally calms down at the end when he realizes that he shouldn't be fusing just to get revenge and that he's putting both himself and Connie in danger in the process]]. The episode "Lars and the Cool Kids", where Lars insults Steven's [[MissingMom dead mother]]. Steven makes the most heartbreaking face you can imagine, before [[BerserkButton absolutely tearing into Lars.]]
269--->'''Steven:''' What do you know about my mom?! ''I'' DIDN'T EVEN GET TO KNOW MY MOM! But I DO know that she saw beauty in EVERYTHING! Even in stuff like THIS [[ManEatingPlant gross moss]], and even in JERKS like YOU!
270** This has been cranked up as of ''Future''. Due to his PTSD, Steven is extremely temperamental, and lashes out at any threat without hesitation, to the point where it goes from self-defense, to fighting, to full-on ultraviolence.
271** Steven gets it from his mother. Rose was an AllLovingHero who, while not perfect, was a beloved leader and kind to everyone...she also lead an armed rebellion against a cosmic empire and ''won'', and the one fight we've actually seen her in [[CurbstompBattle ended in one hit]]. She's also physically strong enough to smash and rip through solid steel barehanded as well as stop the full forward momentum of a run away Ferris Wheel without even budging an inch. [[spoiler:It's also revealed that she successfully ''[[FakingTheDead faked her own death]]'' when she was Pink Diamond, which fooled ''everyone''.]]
272** Garnet as well. She's normally seen as {{The Stoic}} (though she's [[CharacterDevelopment started emoting more in general]] in recent episodes), but when she loses her temper, it is ''[[NightmareFuel horrifying]]''. [[spoiler: Pearl found this out when she lied to Garnet in order to continue fusing with her.]]
273** Pearl is very sweet to the people she likes, and it takes quite a lot to make her mad. But in the episode "Back to the Barn", [[spoiler: Peridot]] begins picking on her [[spoiler: for being created as a [[SlaveRace made-to-order servant]]]]. Pearl gets very ticked off at that, starting the episode off with a very angry speech towards her.
274--->'''Pearl:''' Now you listen here you tiny twerp! In case you've forgotten, you're on OUR turf now, and I did NOT fight a thousand-year war to take orders from the likes of YOU!
275*** Near the end of that same episode, Pearl finally gets enough of [[spoiler: Peridot]]'s teasing, and gives her one HELL of a right hook.
276** Spinel counts as this as well, understandable when you know what happened to her before the series even began. When she's cheerful, she's the loveliest friend you could ever dream of. When provoked, Spinel has the ability to take out the Crystal Gems AND Steven, [[spoiler: bear in mind he is [[DidYouJustPunchOutCthulhu a Diamond,]]]] without any difficulty.
277* In ''DC Showcase: WesternAnimation/SupermanShazamTheReturnOfBlackAdam'', Black Adam learned that even though [[ComicBook/{{Shazam}} Captain Marvel]] is the ultimate nice guy boyscout (even compared to Superman), presenting him a SadisticChoice and then trying to kill the hostage anyway is a [[LetsGetDangerous BAD IDEA]]. It doesn't matter how experienced or powerful you are, [[CurbStompBattle you WILL get your butt kicked. SOUNDLY.]]
278* ''WesternAnimation/TaleSpin''
279** In the episode "In Search of Ancient Blunders", AdventurerArchaeologist Myra is as friendly and polite as you could hope--but she has her limits. After she, Baloo and Wildcat spend a day being chased around a pyramid by the Air Pirates (who want to loot it) and a {{mummy}} (who wants to protect it), Myra finally loses her temper and yells at the mummy: "We're trying to help you! You can stomp around all day growling like an idiot, or you can give us a hand!" The mummy takes Myra's advice and gets rid of the Air Pirates.
280** Then, there's [[CheerfulChild Molly's]] [[LittleGirlsKickShins shin attacks]] on Covington and his goons in "Molly Coddled".
281* ''WesternAnimation/TeenTitans2003'':
282** Lovable and quirky Beast Boy, who usually runs away from anyone powerful and evil, when sufficiently provoked is [[LetsGetDangerous quick to bring the pain]]. All of which are surpassed by the penultimate episode of Season 5 (which starts off with his growling "NOW try and follow me!" and blowing up some fallen robots, right after the Brain is done gloating over his victory over '''all''' the other Titans), in which Beast Boy assembles a rag-tag team, leads it properly, and takes on '''all of the show's villains''' at the same time. He closes it by quipping "Brain Freeze", after freezing the Brain. Never cross a guy who can [[{{Animorphism}} turn into some of nature's most powerful and dangerous animals]].
283** When [[TheHeart Starfire]] drops her usual sweet, gentle, FriendToAllLivingThings persona and goes into full on [[ProudWarriorRaceGuy Tamaranian battle mode]], ass-kicking ''will'' ensue. In her chronological first appearance she is captured by the Gordanians as a slave/trophy, and breaks out so fiercely she leaves her captors terrified, going on a rampage in Jump City where she fights evenly with the other Titans. All while being shackled and prevented from using her full powers. Heck, the main reason the [[TrueCompanions Teen Titans]] formed in the first place was to get her to calm down!
284** Raven, who while more cynical, is generally a [[TheQuietOne fairly reserved]] person. God help you if you piss her off, though, because it's her ''careful control'' that keeps her from going OneWingedAngel. As both Slade and Dr. Light can attest, an angry Raven is terrifying, not to mention [[BewaretheQuietOnes lethal.]] Season 4 shows that Raven is [[TheBigGuy more powerful than all four of her teammates]] ''combined'' under the right circumstances.
285** Terra is a cute, big-eyed teenager who likes joking and goofing around. She can also [[spoiler:be extremely violent and a WoobieDestroyerOfWorlds when provoked.]]
286* "Franchise/TeenageMutantNinjaTurtles": Leonardo, Donatello and Michelangelo all have shades of this, regardless of which version:
287** Leonardo is second only to Michelangelo as the nicest of the Turtles, but as we've seen in ''[[WesternAnimation/BatmanVsTheTeenageMutantNinjaTurtles Batman vs. The Teenage Mutant Ninja Turtles]]'', harming his brothers is a good way to enrage him.
288-->'''Leonardo:''' (to Batman) "Whoever you are, you better back the hell away from my brothers!"
289** Oh, and did we mention that in the [[WesternAnimation/TeenageMutantNinjaTurtles2012 2012 series]], Leonardo is the one who [[spoiler: ultimately ends the Shredder's life to avenge his master?]]
290** Donatello is no slouch, either. In the episode of the [[WesternAnimation/TeenageMutantNinjaTurtles1987 1987 series]] titled "Night of the Dark Turtle", a shock from an altercation with one of Shredder's machines transforms him into a rage-filled vigilante hell-bent on ending the Shredder. Raphael [[LampshadedTrope lampshades]] this:
291-->'''Raphael:''' "I think I liked him better when he was the meek, brainy one."
292** Michelangelo is FunPersonified and the friendliest of the Turtles, but he's just as capable of kicking some serious shell as his brothers, so underestimating him is ill-advised.
293* Anet from ''WesternAnimation/Thundercats2011'' is a ForgetfulJones Elephant monk, kind natured and peaceable, who, like the rest of his Village, is more prone to meditating on a problem than taking direct action. When their village is invaded by LizardFolk, the dire straits prompt a collective AwakeningTheSleepingGiant, and Anet in particular leads the charge. He tosses one of the invading force's {{Walking Tank}}s into its neighbor, and makes short work of the Lizard general's bayonetted rifle, wrenching it out of his hands and bending it in half. In response, the general flees in terror.
294-->'''Slythe''': [[ThisCannotBe But the Elephants never fight]]!\
295'''Aburn''': It is rare, but when we do, we fight to ''win''!
296* ''WesternAnimation/TinyToonAdventures'':
297** Shirley the Loon:
298*** Shirley the Loon is the very model of serenity and inner peace, but when a plan for her and the other girls to abscond to the prom of a rival school ends with Miss Loon doused in punch, she snaps, in an obvious nod to ''Literature/{{Carrie}}''.
299*** In another episode, Shirley is driven to distraction by Plucky when he wants her to channel a genius into him to help him ace a math test he didn't study for. She ends up finally snapping and killing him with kindness by channeling Albert Einstein. It seems that Einstein wasn't that good at math...
300** Part of "Phone Call from the 405" had normally adorable and chipper Sneezer briefly chew out Buster and Babs for having him calm down an angry Steven Spielberg over the phone.
301* ''WesternAnimation/TotalDrama'':
302** Beth and Lindsay spend a good deal of the season under [[AlphaBitch Heather's]] heel, which makes these instances all the more satisfying. First, Beth ''finally'' realizes that she's serving someone she hates, and as a result drops the challenge and [[BackstabbingTheAlphaBitch begins shooting her with her paintball gun]]. Then, much later, after Heather pretty much tosses Lindsay aside despite total loyalty, she responds by cussing her out, much to Heather's shock (and everyone else's approval); sadly, the latter moment was subject to {{Bowdlerization}} in US broadcasts.
303** In "Paintball Deer Hunter", [[GentleGiant DJ]] pulls this off on Owen, who was hunting him throughout the first half of the challenge, by ''throwing him off a cliff.''
304** Geoff and Bridgette are among the nicest characters on the show, but both show limits to their patience. When Geoff gets AcquiredSituationalNarcissism in ''Action''[='=]s Aftermath, Bridgette becomes increasingly frustrated with Geoff's sadistic actions and snaps in the third one, temporarily breaking up with him and having him put on his own Truth or Electrocution challenge to give him a taste of his own medicine and knock him back into his senses (it succeeds and they make up). Similarly, Geoff is outraged on ''World Tour'''s Aftermath when [[SmugSnake Blaineley]] (who has spent the season trying to cause tension between Geoff and Bridgette) has Bridgette sent to Siberia in her place, and he proceeds to humiliate Blaineley and trick her into getting shipped off to the competition.
305** Even Owen has his moments. In "Trial by Tri-Armed Triathlon", he's handcuffed with Heather for the episode, and in the last challenge, Heather starts badmouthing all the eliminated contestants. Owen snaps when she insults Izzy, leading him to cuss her out in the confessional in a similar manner to Lindsay earlier.
306** Harold took a ''lot'' of torment from Duncan over the course of the first season. When Duncan's love interest Courtney is suddenly and inexplicably voted off, the end of the episode reveals it was because Harold cheated to switch the votes.
307** Gwen may be a harsh and snappish goth, but she really has a [[HiddenHeartOfGold golden heart inside of her]] and is defenitely one of the kindest characters of the first generation cast. But if one dares to act insensitive or toy with her, she will make your life miserable.
308** In "Greece's Pieces": DoggedNiceGuy Cody has been trying to get Gwen's attention for about three seasons. Instead, Gwen wound up kissing Duncan, even though ''he'' was still dating Gwen's friend(ish) Courtney. Cody had a slight HeroicBSOD after finding out, during which Duncan showed up, unaware what was going on. Then [[KickTheDog he insulted Cody's outfit]]. Then Cody knocked him out in one punch. Can be found [[https://www.youtube.com/watch?v=Ldsvwzc4zKs&NR=1 here]].
309** In ''Revenge of the Island'', Zoey is this trope personified, undergoing a MadnessMakeover and [[FreakOut a drastic change in personality]] in "Eat, Puke, and Be Wary" after being pushed too far. Fortunately, the personality change does not last long.
310** This even happens to Mike and Cameron when pushed too far.
311* ''Franchise/{{Transformers}}'':
312** ''WesternAnimation/BeastWars''/''WesternAnimation/BeastMachines':
313*** Rhinox is of the standard GentleGiant variety. Once something ''does'' get through his skin, he's a raging mass of strength and firepower that even ProudWarriorRaceGuy Dinobot has learned to tread lightly around.
314---->'''Dinobot''': With [[HeroicSacrifice Optimus gone]], ''I'' should lead--!\
315''[Rhinox [[NeckLift grabs Dinobot by the throat and lifts him off the floor]]]''\
316'''Rhinox''': I'm in a ''bad mood''. ''Understand?''\
317'''Dinobot''': ''[weakly]'' Uh-huh...
318
319*** That episode where the Predacons capture him and [[FaceHeelTurn make him evil]]. [[ChronicBackstabbingDisorder Destrucity ensues]].
320*** This is taken further in ''Beast Machines'' [[spoiler: when Rhinox was turned into Tankor, the Tank Drone General and lost his morality even after regaining his spark. He alone became a creditable threat to both Optimus AND Megatron, the former having a band of elite soldiers while the latter has the entire planet under his control. It says a lot about the Maximal's former chief scientist]]
321*** Optimus. He'd rather not fight, even trying to reason with [[BigBad Megatron]] ("Why start this up again?"). Sufficiently pushed, he becomes a {{determinator}} who will forcefully remind you that he ''is'' a Prime. (well, Primal. Same thing)
322*** Tigatron, the resident FriendToAllLivingThings... who will make you regret it if you '''''threaten''''' to harm nature, like [[spoiler:Inferno]] learned.
323** ''WesternAnimation/TransformersAnimated'':
324*** Bulkhead. Usually a GentleGiant, though very good in battle, but if he even thinks you hurt his human friend Sari, prepare for a beatdown.
325*** Sari, especially after [[spoiler: she upgrades]] in Season 3. Even before that she managed to scare off the Constructicons with nothing more than herself and a pair of roller skates.
326** ''WesternAnimation/TransformersPrime'':
327*** Bulkhead's counterpart is just as nice off-duty. But when he goes to war...well, there's good reason that he was part of the ''Wreckers'', one of the most badass Autobot combat units in ''multiple'' continuities. This is exemplified in one episode where he tries to tell his human friend Miko to look away, right before he proceeds ''to tear out a Vehicon's spark.''
328*** It's very, very hard to make Optimus legitimately angry at you. [[UnstoppableRage This is a good thing for everyone involved.]]
329*** Bumblebee is usually a very friendly and sweet character. However, when [[spoiler: Megatron nearly killed Raf]], Bumblebee's BerserkButton was pressed and he would have shot and attacked the former if Arcee and Bulkhead didn't hold him back.
330*** In the Prime finale, Bumblebee [[spoiler: '''kills Megatron!''']]. Beware the nice one indeed.
331** The ORIGINAL Optimus Prime from ''WesternAnimation/TheTransformers''. AFatherToHisMen, and a kind-sparked GentleGiant...up until someone pushes him too far, then he demonstrates just WHY he is the leader of the Autobots.
332* ''WesternAnimation/TheVentureBros'':
333** Do ''not'' [[BerserkButton be rude to Triana Orpheus]] in the presence of Dean Venture. He may throw [[WimpFight sissy punches]], but he'll throw a ''lot'' of them, and he won't give you any warning first.
334** Dr. Orpheus, for all his melodramatic flair, is generally a decent guy. Loving father, good friend to the Venture Family and, of all the people seen in the show, the most genuinely heroic. HOWEVER: Push him too far and you'll pay for it. As "TWO FOUL-MOUTHED REDNECKS!" learned to their regret.
335* Doug, the adorable and [[TheWoobie pitiful]] Koala-Man from ''WesternAnimation/UglyAmericans'' who cries OnceAnEpisode, was revealed in one episode to [[spoiler:be a former international assassin]].
336* Nabu from ''WesternAnimation/WinxClub'' is usually a nice person, but during Season 4 Episode 24, after the evil shapeshifter Duman turns into a monster and reveals that the Black Circle lied about their apparent HeelFaceTurn and that they are really planning to seal the Earth fairies away for good, Nabu proceeds to single-handedly defeat Duman, by trapping him inside a magical sphere which then ''explodes''. Brandon even comments on this afterwards:
337-->'''Brandon''': Hey, remind me never to make you angry!
338** This seems typical of all fairies. Sure, they're nice most of the time, with them being all about love. The first time Bloom got angry, she chased away the Trix and a couple dozens witches. At times Tecna is positively murderous, and (in the original version) can't understand the concept of fighting another day. And while the Earth Fairies are very nice when calm, when furious they become TheFairFolk, genocidal tendencies included.
339** Regarding the Winx, this especially goes for Flora, who dislikes fighting of any kind, has few offensive attacks and literally feels pain when nature is destroyed. Don't call her pathetic and do ''not'' hurt her little sister!
340* Hay Lin from ''WesternAnimation/{{WITCH}}'' is a bubbly GenkiGirl who is generally the least violent of the Guardians. But when [[BigBad Nerissa]] stuck her crush Eric on a miniature sun and mocked her about turning him into a charcoal briquette, she snaps out of her HeroicBSOD and throws her across the room, and then proceeds to unleash hell on Nerissa's thralls, all of whom have twice the power she has.
341** Matt also counts. He's not even a BadassNormal, but while being possessed by the demon Shagon he fought back hard and made him sweat to keep Matt under control. Matt eventually defeats him in a BattleInTheCenterOfTheMind when he threatened to kill Will. Later episodes had him become one of the Regents of Earth, after which he regained Shagon's powers for himself.
342* M'gann from ''WesternAnimation/YoungJustice2010'' is a sweet bubbly girl most of the time. She also turns out to have PsychicPowers that dwarf those of any other Martian her uncle has ever met. When the villain [[EvilCounterpart Psimon]] threatens to expose her greatest secret -- the fact that she's [[spoiler: actually a White Martian, not a Green one]] -- she's willing to do anything to stop him -- including knocking her own friends unconscious before they can see her, then [[MindRape Mind Raping]] Psimon into a coma.
343--> '''Psimon:''' Now, now, my pretty. I know you don't want to do anything you'll regret.
344--> '''M'gann:''' ''You don't know me AT ALL!''
345** By Season 2, MindRape has become a standard tactic for her, even as her [[spoiler:ex-boyfriend]] ComicBook/{{Superboy}} voices his obvious disapproval. This ultimately culminates in her using it on [[spoiler: Kaldur]], in a rage over his murder of [[spoiler: Artemis]] and kidnapping her [[spoiler: boyfriend]] [[FishPeople La'gaan]] and [[HappilyAdopted brother]] [[{{Animorphism}} Beast Boy]]. Which leads to a HeroicBSOD when [[spoiler:she realizes he's a double-agent and Artemis is still alive]].
346

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