* Played strait in [[Webcomic/TheAdventuresOfGyro The Adventures of Gyro]], the Disney comic parody. In the story Gyro Gearloose - the nices person in Duckburg snaps for no reason, start kidnapping children, destroys characters property, burns down Scrooge's Money Bin, kills Magica De Spell by burning her alive and tires to butcher few more characters. Since Gyro is usualy the most plesant character nobody even suspects him of making such terrible things...
* White Mage from ''[[Webcomic/EightBitTheater 8-Bit Theater]]'' shows this after rebuilding a city and its inhabitants from destruction at various hands (although mostly Black Mage) only to have the city yet again annihilated at the hands of, apparently, Black Mage. Feeling distressed and angered (also mostly due to Black Mage, although Fighter had an unwitting hand in it), she changes her robes and begins bestowing her mediocre evil upon the world for a couple comics until changing back after a strange talk with Fighter.
** [[http://www.nuklearpower.com/2005/05/22/e3-05-dream-analysis/ One guest strip]] had Black Mage push her over the edge with one too many pickup lines, whereupon she began chasing him with a chainsaw.
** A better example would be Fighter, the nicest, friendliest, [[TheDitz ditziest]] character in the comic who has a very potent BerserkButton whenever his friends, especially Black Mage, are threatened. He went into an UnstoppableRage when Black Mage was killed, fought a ''fire demon'' to a standstill after she [[spoiler:killed Black Belt]], and [[http://www.nuklearpower.com/2007/12/11/episode-930-turnabout/ this comic]].
--->'''Fighter''': Also, I can block any attack and kill '''anything''' that bleeds. '''Hint'''.
** Thief and Red Mage better watch themselves... they [[http://www.nuklearpower.com/2008/06/28/episode-1010-nightmare-fuel/ almost made that mistake again]].
--->'''Thief''': Yes, it is a good thing. Leaving him to rot would be wrong.
--->'''Red Mage''': So very wrong.
--->'''Fighter''' (holding up a sword): Kind of '''chainsaw''' wrong.
--->'''Thief''': Okay, good thing we're all on the same page then!
** While he is in no way [[{{Jerkass}} a nice one]], a case can be made for [[spoiler: Sarda]] given that [[spoiler: he used to be the Onion Kid whose life Black Mage repeatedly ruined and seeks revenge against the Light Warriors for doing nothing to stop Black Mage.]]
* Max of ''Code Name: Hunter'' fills this trope pretty well. Sure that he is responsible and mild-manered (and [[SociallyAwkwardHero a little shy]]), but just don't you forget that Max has years of trainning in swordfigtht and experience in beat up warlocks and magical creatures. So, if you leave him no choice [[LetsGetDangerous but fight]] (or [[BerserkButton pushing him too far]]), Max will [[CurbStompBattle Kick your ass]] [[NoHoldsBarredBeatdown very painfully]].
* ''Webcomic/ElGoonishShive'' has Grace, super cute pacifist who just [[InnocentFanserviceGirl wishes people wore less clothes.]] You can tie her up, torture her, even tell her you are going to use her for a ''breeding'' program. Make her believe you have hurt one of her friends though and there is [[SuperSoldier no power on Earth or beyond that can save you]].
** To not quite as potent an extent, Elliot. He's extremely nice and by default helpful. Of course, mocking Tedd or any of his friends changes things.
** And now, we learn, Noah. Not only do his [[ViewerGenderConfusion girly looks]] hide inhuman strength and speed, but his [[SpockSpeak particular speech patterns]] are a deliberate focusing mechanism to keep control of an otherwise short temper.
* Rikk, the leader of the Science Fiction Club in ''{{Fans}}!'', is as nice, gentle and forgiving a man as you're ever likely to meet. However, during a storyline in ''{{Fans}}!'' which sees a bitter ex-boyfriend of Alisin's blackmail her into joining him, while simultaneously attempting to destroy the fan-club and replace it with a [[DarkerAndEdgier new, darker version]] - Rikk is finally pushed too far, and beats the ex-boyfriend to a pulp before someone stops him from going too far.
* Piro from ''MegaTokyo'' is an example, as a group of perverted otaku voyeurs in a restaurant found out. This is more obvious in Piro's online alter-ego ''Piroko'', and associated wallpapers/[[http://www.megagear.com/product_p/1010.htm tshirt]] with a cute girl carrying a big gun, and the phrase "Ph34r t3h cute ones".
** Ping from the same comic could be an example, as well. She's normally sweet, cute and caring, but get her angry and she proves to have the strength to uproot a street lamp and use it to beat a [[{{Kaiju}} giant monster]] into submission.
*** "[[http://megatokyo.com/strip/376 That was very rude,]] [[http://megatokyo.com/strip/378 Mr. Turtle!]]"
* Nice people in the {{Walkyverse}} usually get this. Joyce is a prime example. So is Walky himself, for that matter. Not to mention Amber... this list could go on for a bit.
-->'''[[http://www.itswalky.com/d/20001018.html Joyce]]''': "This is for the thousands of little comments that are hammered into me every day! "Stop giggling, Joyce!" "Put down your dumb toys, Joyce!" You can only take so much... Until you ''snap''."
* Lemmy in ''Fanboys'' is a genuinely nice guy, but woe be unto anybody that says Nintendo is a kiddy system.
** [[http://www.fanboys-online.com/?p=143 ANGRY CLOWN MODE.]]
** An impact to the head can do it. When running from a crazed feral crab in the BeachEpisode, he crashes headfirst into a sign, which triggers the aforementioned Angry Clown Mode, allowing him to handily demolish his tormentor.
* Sam has a moment of this when blackmailing a ninja in this [[http://samandfuzzy.com/963 this]] SamAndFuzzy strip.
* [[http://questionablecontent.net/view.php?comic=1108 Surprisingly]], Hannelore, ''QuestionableContent'''s resident {{Woobie}}. Not to mention her [[http://www.questionablecontent.net/view.php?comic=1171 dreams]].
* Out of ''[[CtrlAltDel Ctrl+Alt+Del's]]'' "Four Players" side story, Player Three, the yellow one, is the one to be careful of. Sure, he starts out as the ButtMonkey of the other three players, each more sadistic than the next, but has been known to ''snap'' while put under extreme duress. Player Two fell victim to this, as Three grabbed him and slammed him against the wall until he ragdolled all while shouting, ''"STOP IT<"''. He then came to and tried to apologize for what he just did.
* In ''DanAndMabsFurryAdventures'', it's [[http://missmab.com/Comics/Vol_293.php Mab]].
** For that matter, Dan. While normally a nice guy with a vague career of adventuring behind him, [[http://www.missmab.com/Comics/Vol_971.php recent events]] [[http://www.missmab.com/Comics/Vol_972.php have]] [[http://www.missmab.com/Comics/Vol_973.php shown]] just how [[http://www.missmab.com/Comics/Vol_974.php dangerous]] he really is after being pushed over the edge. It's [[http://www.missmab.com/Comics/Vol_981.php not pretty]].
** It's not as explicit now that element of her character seems to have been [[EarlyInstallmentWeirdness phased out]], but Lorenda Soulstealer used to eat people who annoyed her, and she still acts enough like a demon to terrorize a group of papparazzis into leaving Jyrras alone even after he gets declared "This Year's Most Eligible Bachelor". Otherwise, though, she's a cheery, good-natured cow whose [[FatAndProud not offended in the slightest by comments on her chubbiness]].
* In Bun-Bun's continuing feud with Santa Claus in ''Webcomic/SluggyFreelance'', Mrs. Claus is the one pushing for the two of them to just let it go, but she's also the more dangerous Claus when she has to be. Bun-Bun [[http://sluggy.com/daily.php?date=991226 acknowledges her as a better shot than Santa]], and it's her who [[spoiler: stops Bun-Bun from [[TakeOverTheWorld taking over the world]]]].
* ''Webcomic/GirlGenius'':
** Gilgamesh Wulfenbach is a genius who never even bothered to build a death ray, and who will put up with massive annoyance to avoid killing people he neither likes nor respects, but when an enemy army really gets in his way, he smashes it in about five seconds.
*** What happens when he gets angry at someone? He [[http://www.girlgeniusonline.com/comic.php?date=20060306 kicks serious ass.]]
*** He even stands up against an ex-[[SuperSoldier Jägermonster]] in [[http://www.girlgeniusonline.com/comic.php?date=20080303 this]] [[http://www.girlgeniusonline.com/comic.php?date=20080305 scene]].
*** He [[http://www.girlgeniusonline.com/comic.php?date=20071126 deals with]] an invasion force against Mechanicsburg while his father is in the hospital in that city. Alone, with a lightning gun.
*** [[http://www.girlgeniusonline.com/comic.php?date=20090323 "If I let everyone I thought was an idiot die, there wouldn't be many people left."]]
** Agatha starts out as a clueless student, then she starts [[TookALevelInBadass taking levels in badass]] as she realizes her sparkiness and gets fighting lessons from Zeetha. She is still generally a nice one, but you don't want to make her angry. [[spoiler: Killing her boyfriend]] is especially [[http://www.girlgeniusonline.com/comic.php?date=20070117 not a good idea]].
** Higgs might seem like a [[TheStoic stoic]] who though MadeOfIron and perfectly capable of fighting does so calmly, is not exempt from this either after [[spoiler: [[http://www.girlgeniusonline.com/comic.php?date=20101020 Zeetha gets stabbed through the chest by Zola]]]].
** Tarvek isn't exactly a "[[TheChessmaster nice one]]", given his ChronicBackstabbingDisorder, but the one and only time we ever saw him be violent, it was a staged fight that both parties got a little too into. [[spoiler: So ''[[http://www.girlgeniusonline.com/comic.php?date=20110117 this]]'' got quite the "Holy shit!" reaction from the fandom.]]
* Liza from ''Tonja Steele'' is a good [[http://tonjasteele.comicgenesis.com/d/20031230.html example]], as she's usually a sweet-natured schoolteacher. Some of it is explained when we meet her [[http://tonjasteele.comicgenesis.com/comics/ts20040120a.jpg parents]].
* ''Webcomic/TheOrderOfTheStick'':
** Elan is mostly naive, sweet-natured but [[TheDitz ditzy]] {{Cloudcuckoolander}}. Elan in strip [[http://www.giantitp.com/comics/oots0594.html #594]], after SmugSnake Kubota poisons his lackey Therkla (who was in the midst of a HeelFaceTurn) and she [[DiedInYourArmsTonight dies in Elan's arms]]; UnstoppableRage-driven BadAss. It's only Kubota's swift-but-slimy opportunism that prevents him from getting a severely lethal ass-kicking at Elan's hands, [[spoiler: and even then he still gets reduced to dust by V]].
** Though [[MinionWithAnFInEvil the Monster in the Dark]] has not yet gone past the breaking point, strip [[http://www.giantitp.com/comics/oots0475.html #475]] suggests that making the monster actually angry is an idea so stupid that it borders on TooDumbToLive.
* Quentyn of ''TalesOfTheQuestor'' gets his sword stolen, and in the course of retrieving it gets arrested multiple times, mugged, shot at, dropped through a roof, stripped naked in front of a crowd of toffs (and his childhood crush), and then violently beaten and tossed in a dumpster. He promptly girds up his loins and proceeds to utterly wreck not one, but TWO street gangs singlehandedly and literally pull an entire building down around their ears... and would have REALLY torn them a new one had the city guard not intervened.
** The Raccoonan nation topped that in the companion strip, ''QuentynQuinnSpaceRanger''. In there, the horrific cannibal species, the Kvrk-Chk, made a public show of what they would do the Raccoonan race when they ate a number of them on camera, The Raccoonans retaliated the next day by [[spoiler:destroying one of the heavier populated Kvrk-Chk solar systems and gave the race a very good reason to fear the Raccoonan people.]]
* Do no try to get uppity with Charles the counselor at Camp Calomine because [[http://www.rhjunior.com/CC/00024.html he'll rip the pay-phone off a utility pole while doing his best impression of the evil Father]] from CodenameKidsNextDoor.
* Plant Woman. It's one thing if you've only built *two* machines of death and destruction. The first law of robotics is thrown out the window completely when you announce the third.
* [[http://drmcninja.com/archives/comic/14p70 This strip]] from ''Webcomic/TheAdventuresOfDrMcNinja'' plays this straight.
* Faen from ''{{Drowtales}}''. She's a rather shy, sensitive girl, who also happens to be a powerful [[TheEmpath Empath]] with less than perfect control over her powers. Strong fear/anger cause PowerIncontinence and since she's a projective Empath, [[http://www.drowtales.com/mainarchive.php?order=chapters&id=268 people]] [[http://www.drowtales.com/mainarchive.php?id=472 get hurt]].
* Calvin/Freckle from ''LackadaisyCats''. Shy, scared, and gullible, but put him in a life-or-death situation and [[http://www.lackadaisycats.com/comic.php?comicid=49 give him a gun]]...
** And Ivy too, [[http://www.lackadaisycats.com/comic.php?comicid=84 as Rocky soon found out]].
* Just about every one of ''"TheDragonDoctors"'' qualifies for this. Goofball wizard Sarin has a dark criminal past and has immense transformational powers when pressed. Kili the sweet and sensitive shaman can transform into a snarling werewolf due to her recent contraction of lycanthropy. Even their mostly-quiet leader Mori, a [[MagiTek magical scientist]], has combat options, and has invented a magic beam that can [[TheNudifier blow your clothes and weapons away.]]
* Guy, from ''MushroomGo''. Guy is a literal [[VideoGame/SuperMarioBros2 shy guy]] that never speaks, happily dedicated to his work as the crew's nurse, cook, and housekeeper. Though afraid of hurting other people, he's proven himself a decent fighter--with [[CombatMedic scalpels]] and [[ChainsawGood chainsaws]].
* MagicAndPhysics has SPDA who seems like a genuinely nice person (being maybe the only one in the strip), but all hints about his back story suggest something that could have easily cost lots of lives.
* Gamzee Makara from ''Webcomic/{{Homestuck}}'', generally the {{Cloudcuckoolander}} of the trolls, recently [[spoiler: [[AxCrazy outright snapped]] and turned into a [[MonsterClown psychopath]].]]
** Don't make [[spoiler: Kanaya]] angry. [[spoiler: She will come back from the dead, turn into a [[OurVampiresAreDifferent rainbow-drinker]], and kick you [[http://www.mspaintadventures.com/?s=6&p=005425 OFF A CLIFF.]]]]
*** [[spoiler: Or clock you in the jaw. Or, if you were the one who killed her, chainsaw you in half.]]
** Dad Egbert goes from constantly baking desserts and writing letters of praise to his son to beating his way out of a prison on Derse and fighting huge monsters without batting an eye when he gets involved in the game. And as [[spoiler: the only naturally-born human in the cast]], he's also a true BadassNormal in a series where ''nothing'' is normal.
** John totally fails to invoke this trope. Behold John [[http://www.mspaintadventures.com/?s=6&p=004567 getting angry]]:
-->That is IT. EVERYBODY OUT. You are DEAD SERIOUS.
*** Later on, [[http://www.mspaintadventures.com/?s=6&p=007235 however]]...
** Then there's Jade, a near-perpetually chipper CloudCuckoolander, who [[GetAHoldOfYourselfMan smacked the crap out of her sprite]] when it turned out to be too {{Wangst}}y to be any help. (for those not in the know, her sprite is at this point a RealityWarper)
* Subverted in ''TheInexplicableAdventuresOfBob.'' Bob is usually remarkably effective at getting things done and defeating enemies, and he hardly ever throws a punch; but it turns out that, idealism aside, part of the reason he isn't a fighter is that [[http://bobadventures.comicgenesis.com/d/20101026.html he isn't very good at it.]] [[BerserkButton (Galatea, on the other hand...)]]
* Iceland from ''Webcomic/ScandinaviaAndTheWorld''. [[http://satwcomic.com/babysitter This explain its all.]]
** As well as Åland, Sweden's boyfriend. Friendly, gentle, metrosexual... until Russia tries to invade and Åland lets loose all hell on Russia, hunting him down and even shooting out Russia's white flag of surrender. The comic being what it is, this is fully based on historical events.
* [[{{Nodwick}} Piffany]] is so full of diabetes-inducingly sweet virtue that ''it gives her RealityWarper powers'', in addition to D&D cleric spells. It's very rare that she gets angry, but when she does, she's easily the most powerful character in the comic. And that's not counting that one storyline where she got holy PoweredArmor...
* ''Webcomic/{{Drive}}'': Nosh is usually a happy, BigEater OmnidisciplinaryScientist. But if you're a [[AlwaysChaoticEvil Tesskan]], and you disrespect his captain (or presumably anyone he considers a friend), he will [[CurbstompBattle curbstomp]] you and nineteen of your buddies.
* Big Ears in {{Goblins}} is a genuinely LawfulGood paladin who occasionaly strays into HonorBeforeReason but avoids KnightTemplar and LawfulStupid. Oh, and he doesn't like it when you [[http://www.goblinscomic.com/10122009/ throw rocks at his catatonic friend]].
* TheOswaldChronicles has the eponymous Oswald, a mild-mannered and polite gentlemouse. He prefers to talk things out instead of resorting to violence. Hurt his friends, however, [[http://www.theoswaldchronicles.com/?webcomic_post=0044-lettered and...]]
* In retrospect, this covers Mirth from ''VoodooWalrus'' as her first appearance involves her [[http://voodoowalrus.com/?p=155 erupting from the belly of a Hobo Jesus]] and then [[http://voodoowalrus.com/?p=163 summoning a flock of fingerbats]] to murder his hobo zombie followers.
* Julie, from ''OurLittleAdventure'' when [[spoiler: an armored Minotaur kills Pauline, a member of her [[TrueCompanions Nakama.]]]] Her bubbly, happy personality vanishes and is replaced by something violent and scary, complete with CreepyMonotone and HiddenEyes. In the next page we see her [[RoyalRapier rapier]] embedded in the Minotaur's skull.
* People in the DominicDeegan world get so hung up on Luna's emotional problems that they always forget that she is a [[http://www.dominic-deegan.com/view.php?date=2007-03-28 master of Black Magic.]]
* Ashton in ''Webcomic/WintersInLavelle'' spends half of the comic looking like a [[TheWoobie scared, lost puppy.]] However, when people start threatening him (or Kari), he manages to fight a random Gard, Xan, and [[spoiler:Prince Edric.]]
* The Webcomic/{{Freakangels}} are, in the words of Alice, kind of crap when you get right down to it. All of them have psychokinetic powers, and can do some serious damage all by themselves without lifting a finger. Out of the group, [[CloudCuckooLander Arkady]] is the most gentle (except possibly [[TheHeart Connor]]), and a FriendToAllLivingThings. But then [[JerkAss Luke]] tries to MindRape some poor girl, and Arkady takes direct action.
-->'''Arkady:''' [[BringMyBrownPants Do you know what that was Luke?]] That was exactly ''one second'' of my overdose experience when we were fifteen. If you ever do something like this again, I am going to give you ''five minutes'' of that.
* The Coffee Shop Lady from ''Webcomic/{{Sinfest}}'' is the nicest, sweetest granny archetype you could imagine, dispensing kindness, coffee and donuts to all, even distraught Devil Girls but [[http://www.sinfest.net/view.php?date=2012-09-09 don't try to push her around]]. Also counts of course as a case of NeverMessWithGranny.
* In ''Webcomic/DoubleK'' (a ''Anime/GurrenLagann'' fan comic), Simon is a sweet little kid who doesn't know what to do without Kamina giving him instructions. Unless you threaten Nia.
-->'''Simon:''' ''(talking to Kamina)'' I-I guess I just forgot how freaked out I was. I mean, I saw poor Nia out there, she was just scared out of her wits, bro, and-and then the suspect started moving in on her, all with that creepy look on his face, and then-then-[[http://doublek.thewebcomic.com/comics/1373093/chapter-4-095/ I dunno, bro, I just-I just knew I had to do something]].
* Lero-Ro and Knag Horyang from ''Webcomic/TowerOfGod''. One is always sublimely cheerful, righteous and nice, he is Ranker and therefore one of the most dangerous people of the Tower and sometimes demonstrates that. The other is a soft-spoken man of [[BewareTheQuietOnes little words]], but he too is incredibly righteous, and while he wishes wrongdoers best luck to survive him, he doesn't hold back.
* Kieri [[TheUnpronounceable Suizahn]], an angel from SlightlyDamned, is usually very [[ShrinkingViolet shy and soft spoken.]] A history of being abused by her parents and peers does make her rather sensitive to [[http://www.sdamned.com/2012/12/12152012/ bullying]], even from other angels.
** [[FromBadToWorse It gets worse]] [[http://www.sdamned.com/2013/01/01052013/ here.]]
* Don't make the cute Sandra from ''Webcomic/SandraAndWoo'' your enemy. When Woo is replaced by Tom the Talking Toast, she first [[http://www.sandraandwoo.com/2012/01/26/0345-the-contender-iii/ eats him]] and then makes the "Hand of God" an [[http://www.sandraandwoo.com/2012/01/30/0346-the-contender-iv/ offer it cannot refuse]]. She also [[http://www.sandraandwoo.com/2009/07/30/0081-8-mile-road/ sent Tanya Dean's family to a bad neighborhood in Detroid]].
* [[TheAce Ace]] from WebComic/CommanderKitty is pretty much the epitome of a NiceGuy...until you lay a finger on [[NumberTwo Freeda]], [[http://www.commanderkitty.com/2010/09/05/double-take/ as one brainwashed goon learns the hard way]]. Even just hearing a [[http://www.commanderkitty.com/2011/07/17/mouse-plays-mole/ completely innocent conversation]] [[http://www.commanderkitty.com/2011/07/24/fruit-its-yummy-and-not-bad/ out of context]] was enough to make him [[http://www.commanderkitty.com/2011/09/04/wardrobe-misplacement/ ruin Mittens' day]].
* ''Webcomic/MSPaintMasterpieces'': ''[[PostMortemOneLiner "Don't threaten Dr. Light!!"]]''
** Bears noting that that is one of ''many'' instances. Mega Man is the nicest guy you could meet, but if you threaten ''any'' innocent people, or worse, actually kill people, he will '''fuck you up'''.
* In ''Webcomic/AvasDemon'', Wraitha restores Ava to life and argues that [[http://www.avasdemon.com/pages.php?page=0268 this was the new life she bargained for, since she didn't ask for "different"]]. [[http://www.avasdemon.com/pages.php?page=0277 Ava disagrees.]]
* ''Webcomic/{{Pacificators}}'': cute, sweet [[{{Adorkable}} Daryl]] [[FriendToAllChildren Smithson]] knows how to [[HiddenDepths wrestle]] [[note]]which she learned from [[MundaneMadeAwesome a stubborn goat]] on her grandparents' farm[[/note]] and [[TheDitz Larima]] [[GenkiGirl Torbern]] is ''scary'' when she's pushed over the edge, complete with a bone-chilling [[http://www.sailorenergy.net/MangaPacificators/MangaPacisV03CH01n202.html death]] [[http://www.sailorenergy.net/MangaPacificators2/MangaPacisV04n108.html glare]].
* Michelle of Webcomics/{{Forever16}} has this in the story line where the school's AlphaBitch tries to break her and Joel apart. [[http://jbwarner86.deviantart.com/art/F16-Don-t-Make-Me-Angry-189875930 Do not make her angry.]] [[http://jbwarner86.deviantart.com/art/F16-Berserk-Button-189987259 You wouldn't like her when she's angry...]]
* Agathoth from ''Webcomic/{{Cloudscratcher}}'' is described like so.
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