When a nice, normal character suddenly goes into a rage, you've hit their BerserkButton.

----

[[foldercontrol]]

[[folder: ''Ah My Goddess'' ]]

* AhArchfall. Hurt or insult Lind and Jago WILL make you suffer.

[[/folder]]

[[folder: ''Literature/A Song Of Ice And Fire'' ]]

* Lady Stoneheart in ''Fanfic/TheNorthRemembers'' is cold, emotionless, to the point of being dead both figuratively and literally. Whether it be hanging [[spoiler:Freys]] or [[spoiler:witnessing a failed trial-by-combat or the reunion with her missing daughter]], Stoneheart never so much as makes an expression of relief, satisfaction, rage, or sorrow. However, during her little reunion with [[spoiler:Littlefinger, the man responsible for literally everything that happened to her family over the story, he makes the mistake of mentioning the Red Wedding and how it was only meant for her son Robb to be killed and for her to be ransomed back into his hands.]] She ''completely loses her shit'' and unleashes herself upon him, strangling the guy and nearly kills him before being stopped by [[spoiler:her daughter Sansa.]]
-->[[spoiler:Lady Stoneheart: ''"Robb? Robb! ROBB!"'']]

[[/folder]]

[[folder: ''Comic Strip/Beetle Bailey'' ]]

* NEVER, EVER attack [[BeetleBailey Beetle around Killer]] if you're a character in a VerizionKittypet written story. You will get a Sarge-level blowup, and you WILL feel it for a long time.

[[/folder]]

[[folder: ''Anime/Blood Plus'' ]]

* Doubled in the ''BloodPlus'' fanfic FanFic/{{Nobility}} has Anjou's initial fight with Nathalie. [[spoiler: Nathalie goes berserk because Forrest ripped a few strands of her hair out. She kills him, which sets off Anjou's berserk button.]]

[[/folder]]

[[folder: ''Visual Novel/Clannad'' ]]

* In ''FanFic/AnEndToAllThings'', messing with Kotomi appears to be one for Okazaki, as evidenced by his reaction when Kotomi's godfather shows up.

[[/folder]]

[[folder: ''Anime/Code Geass'' ]]

* [[TroperWorks/CodeGeassRFlamesRaiser Maftie Ciel Raza]] has a very very VERY dim view anyone who kills his fellow pilots. Even [[AcePilot Suzaku]] found that out the hard way... and the Nero Lancelot is based on the older Conquest model and not on the newer Albion...

[[/folder]]

[[folder: Cross Over ]]

* Don't remind Firefly from ''[[{{FanFic/AceCombatTheEquestrianWar}} Ace Combat: The Equestrian War]]'' about [[spoiler: the death of her parents]].
* [[FanFic/BetterLivingThroughScienceAndPonies Don't ever insult background character Ditzy Doo's child]] and expect to get away with it; she doesn't mind the mocking nickname 'Derpy Hooves' but dissing her foal will just lead to her helping Chell wreck you.
* [[{{Slayers}} Lina]] in ''Fanfic/BloodThatFlows'' is pretty calm most of the time. Doing anything to harm her daughter, or her future adopted daughter, or even her daughter's friends however, is a quick way to [[RetiredBadass bring her out of retirement]] and show you all new ways to feel pain. To date, she took on a Mazoku Lord while being injured, another one while being pregnant, nearly ripped a Gold Dragon and her sister a new one and committed genocide on a criminal organization, the last one because they attacked her husband.
* Kugimiya in ''[[http://www.fanfiction.net/s/6260492/1/Happy_Families_Are_All_Alike Happy Families Are All Alike]]'' (Naruto/Negima crossover) gets *pissed* when her friends suggest that she's masculine.
* There are some things you don't do in ''Fanfic/KyonBigDamnHero''. You do not threaten any of Kyon's friends. One time that happened, he dangled the person responsible out a window by the ankle and proceeded to put him through a HumiliationConga [[spoiler: for trying to shove Tsuruya off that same window]]. Similarly, threaten Kyon's life, and Haruhi ''will'' kill you. The only reason she didn't kill the criminals responsible for [[spoiler:Kyon's shooting]] was because Koizumi convinced her that Kyon wouldn't want her to.
* ''FanFic/PaperMarioX'': {{Kirby}} when he hears Meta Knight kissed his girlfriend, [[VideoGame/PaperMario64 Bow]].
** [[Franchise/TheLegendOfZelda Link]], Kirby, [[{{Metroid}} Samus]], and {{Franchise/Sonic|TheHedgehog}} whenever their respective soul partners are in danger. Link also had a bad episode when Sonic was in danger on Lavalava Island.
** Don't make fun of Samus in front of her. Sonic and Link found that out the hard way.
* In ''[[http://www.fanfiction.net/s/1234810 Path of Chaos: Ascension of Supremacy]]'', don't you dare harm Ranma's mother. This can apply to 90% of ''[[RanmaOneHalf Ranma]]'' fics, but this one [[UpToEleven takes the cake]].
** While fighting the Justice League (not as ridiculous as it sounds) Superman gets a little too over zealous with his laser vision and shoots Ranma's mother, [[spoiler:Tokimi]], in the back. Ranma goes into a rage and destroys [[NoKillLikeOverkill "the west and north quadrants of the universe".]]
*** Luckily the Lantern Corp send the future Green Lantern back to warn them and they manage to stop superman in time.
* ''Fanfic/RiseOfTheGaleforces'': Whatever you do, do '''NOT''' [[TaxonomicTermConfusion call]] [[PteroSoarer Adam]] [[IAmNotWeasel a]] [[SomewhereAPaleontologistIsCrying "dinosaur."]] PlayedForLaughs twice... [[spoiler:and very much PlayedForDrama alongside another BerserkButton - harming Violet in front of him - in Chapter 25,]] leading to an UnstoppableRage.
** And while we're at it, it's probably not a good idea to call [[TheIncredibles Dash]] a [[EatsBabies "morsel"]] either. [[spoiler:Velociripper does exactly that in Chapter 6, and [[ShockAndAwe gets toasted.]]]]
** If you fuck up the canon [[spoiler:Violet]] is participating in, threaten [[spoiler:her]] family, or [[YankTheDogsChain yank]] [[spoiler:her]] [[YankTheDogsChain chain]] on a personal level, [[spoiler:she]] will '''[[CurbStompBattle END]]''' you. [[spoiler:Ludlow learned all of these the hard way, and did not live to tell the tale.]]
* ''FanFic/SonicGenerationsFriendshipIsTimeless'': Do not make [[VideoGame/SonicGenerations Amy]] angry. [[WesternAnimation/MyLittlePonyFriendshipIsMagic Spike]] found that out the hard way.
-->'''Spike''': WHY WOULD YOU LEAVE ME WITH SOMEONE LIKE HER?\\
'''Sonic''': WHY DO YOU THINK I SAID DON'T MAKE HER ANGRY? WHAT, YOU THINK I WAS BEING CUTE?
* ''FanFic/AShadowOfTheTitans'': Don't come between [[AxCrazy Gadjo]] and his [[TrademarkFavoriteFood pies]]. For a good example of why, it's shown that a previous employer of his once tried to summon an EldritchAbomination; when Gadjo realized that TheEndOfTheWorldAsWeKnowIt would mean no more bakers and therefore no more pies, he proceeded to ''rip his boss' head off with his bare hands.''
* Rei in ''Fanfic/ShinjiAndWarhammer40K'' is for the most part as non-threatening as she is in [[Anime/NeonGenesisEvangelion the source material]], but she takes her self-appointed protection of Shinji ''very'' seriously, with his kidnapping being the first time [[ApocalypseMaiden Apocalypse Rei]] was unleashed.
* In [[http://www.fanfiction.net/u/849822 Shadow Crystal Mage's]] ''MagicalGirlLyricalNanoha''[=/=]''GreenLantern'' MegaCrossover fic ''[[http://www.fanfiction.net/s/6095074 Takamachi Nanoha of 2814]]'', the fact that [[PlutoIsExpendable Pluto is no longer a planet]] really sets off [[SailorMoon Sailor Pluto]], causing her to go into a BerserkerRage. It's very effective when the Wolkenritter show up...
* In [=SariSpy56=]'s ''Tales from Mellowbrook'', a Kick Buttowski crossover fanfic, a few characters and fan characterss have berserk buttons: Avery Buttowski, a cousin of Kick Buttowski (on his mother's side) had a few berserk buttons: In the tale ''A Visit From Avery'' 1) it is not wise to call Avery a Mexican. Your ass will turn red if you do so. 2) She hates not only Lois, but everyone in Quahog due to their cruel nature. Except Meg of course. 3) Don't harm either Kick or any other members of her family in front of Avery. An evil babysitter from "The [=SpyNapping=] Sitter" learned that the hard way. 4) Don't compare her to Father, the archenemy of Kids Next Door. She hates him for making her grandmother's life a living hell. 5) Don't harm Johnny Test in front of Avery. She doesn't even care if it's about 98% the population of Mellowbrook. DON'T FUCK WITH AVERY! 6) Avery is not annoyed by people, unless you're either Quagmire or Wacky Jackie. Quagmire did that numerous times whenever Avery mentions his name. Jackie only did that whenever Kick is present with Avery. 7) Don't harm her friends when Avery is present. 8) Annabelle Magnuson, Gunther's cousin also had a few berserk buttons (her character is still in progress) 9) Whenever Annabelle is going on a trip and the only route is the airplane, if you value your life, DON'T ask her to change seats for ridiculous reasons. Dash Baxer learned that the hard way. 10) Brad doesn't like it when other males (Gordon Gibbles for example)flirt with his beloved Selena. Do so and Brad will pound you into turkey meat.
** Kick had a few berserk buttons in a few tales: 1) Don't harm Kendall when Kick is present. Start praying for your life. 2) Like Avery, Kick hates everyone in Quahog (except Meg). 3) Don't harm his family or friends when Kick is present. Better start praying for you life. 4) Whenever Kick is the subsitute barber, don't annoy him or give him ridiculous commands if you value your life. Once his button is pressed, he will go insane like Sweeny Todd. Peter Griffin learned that the hard way.
** Kendall had only a few to begin with: 1) Kendall would normally be uninterested into doing awesome things as suggested by either her friends or anyone else. But mention [=KitKat=] candy bars and she'll be interested. 2) She hates being called "Kandy". This happens only on Avery as in the past, she and Kendall used to be bitter rivals.
* ''FanFic/TimeLordsAndTerror'': Go to the Live Action Television section and check out how harming his Companions (or people he likes) is a button for [[Series/DoctorWho the Doctor]], and vice versa. Then take into account that that dynamic now applies to [[WesternAnimation/MyLittlePonyFriendshipIsMagic the Mane Cast]] and do the math.
** That being said, over the course of the story the Doctor manages to hit a couple of Twilight Sparkle's other buttons, from the comedic (accidentally teleporting one of her books to the sun) to the dead serious (telling her that his contingency plan for stopping [[spoiler: the S'Muz]] from destroying TheMultiverse is to [[NecessarilyEvil destroy Equestria]]).
** Speaking of [[spoiler:[[EldritchAbomination the S'Muz]]]], ''all of reality'' is a BerserkButton to it, [[OmnicidalManiac one that's stuck permanently in the on position.]]
** The sequel, ''FanFic/MinesOfDragonMountain'', adds another very big one for Twilight -- do ''not'' try to harm Spike, or she will '''''[[MamaBear end you.]]'''''
** Similarly, don't threaten [[MoralityPet Cheppu]] where [[PapaWolf Gabbro]] can hear you.
*** [[spoiler: [[BigBad Tirac]]]] learns both of the above the hard way; the former [[spoiler: blasted him ''through a meter-thick stone wall'']], while the latter [[spoiler: ''fought off his DemonicPossession'' and threw them both into a lava pit]].
** Zeitgeist Stardust will do anything to [[AFatherToHisMen protect his employees]]. The Grundels' attacks on his mines were at first only viewed as an annoyance, but then they started killing his men, at which point he declared war [[spoiler: and was initially even willing to commit genocide]]. Fortunately, events panned out well for everyone in the end.
* ''FanFic/TurnaboutStorm''
** Do NOT ask [[WesternAnimation/MyLittlePonyFriendshipIsMagic Rarity]] about why she didn't show up at the trial, NOR mention the post office or pens in her proximity. [[VisualNovel/AceAttorney Phoenix]] learnt it the hard way.
** For a more [[DownplayedTrope subdued]] but serious one, [[spoiler:do not talk bad about your siblings around Cruise Control]].
** Do ''not'' call Gilda slow, she's already ballistic enough as it is without the entire courtroom telling her that.
* In ''[[http://www.fanfiction.net/s/6335808/1/The_Wizard_in_the_Shadows The Wizard in the Shadows]]'', if you hurt someone Harry cares about, he will burn you until there is nothing left, hit you with lightning bolts that vaporised a Mumak (and that was a secondary effect), or use the Cruciatus curse [[spoiler: in fairness, he had just found Sirius who Saruman had been torturing for the last seven years]] on you repeatedly.
** Ginny has the ViolentlyProtectiveGirlfriend thing going on with Harry (not that he can't fight for himself). When [[spoiler: he dies temporarily]], she destroys most of Mordor's army (by channelling some sort of higher power), utterly destroying the physical forms of three of the Nazgul.

[[/folder]]

[[folder: ''Franchise/The DCU'' ]]

* ''Can't Get You Out Of My Head'' has Joker, who takes a very, very dim view of implicating him in something that he didn't do. as he put it:
-->"There isn't enough room in this town for me and somebody who would do a thing like that, and they're going to be the ones to go. I am going to find whoever did this, expose them, and clear my name. And then I'm going to teach them the error of their ways. Over several days. With a dull knife dipped in iodine, so it really hurts and so they don't get an infection and die before I want them to."
* ''{{DC Nation}}'': [[TooDumbToLive Terra found out the hard way]]: [[http://community.livejournal.com/jla_watchtower/704725.html?thread=16998357#t16998357 If you're going to try and kill Changeling's girlfriend, do not follow it up by "making fun" of the way Doom Patrol died.]]
** Harm a single hair on Corrine Bertrand's head OR his sister's head, and Caleb Zukov will show up with his demon's-blood based magic and a Desert Eagle to make you terribly sorry about it.
* From ''The Doctors and the Nurses They Adore Me So'', hurting the Joker's dog is bad for ''everyone''.

[[/folder]]

[[folder: ''Manga/Death Note'' ]]

* In ''FanFic/AllYouNeedIsLove'' Light flips out at any mention of [[SoapWithinAShow Matsuda's soap opera]], [[TakeThat or more specifically of Matsuda's "reimagining" of his character as]] [[TheWoobie poor]] [[{{Wimpification}} wimpy]] [[ThisIsMyNameOnForeign Hikaru]] [[MemeticMutation Imagay]] [[TakeThat the gay prostitute.]]

[[/folder]]

[[folder: ''Anime/Digimon Tamers'' ]]

* One warning for readers of the ''FanFic/TamersForeverSeries'': Do not, under ''any'' circumstances, put someone Takato cares about in danger, or he will '''''end''''' you.
** The Nightmare intentionally tries to press Takato's BerserkButton by torturing his friends.
** [[spoiler: Daemon]] also hits Henry's BerserkButton when he [[spoiler: attacks and critically injures (she had to be put on life support) Henry's seven year old sister Suzie in cold blood]].
** Rika's BerserkButton is triggered when [[spoiler: a swarm of Kurisarimon and [=DarkScubamon=] torture Takato almost to death]].

[[/folder]]

[[folder: ''Manga/Fullmetal Alchemist'' ]]

* The ''Manga/FullmetalAlchemist'' fanfic series ''The FanFic/ElementalChessTrilogy'' has all the same {{berserk button}}s as the original canon. In addition, though, some others come up. Don't endanger Ling's friends, his people, or his little sister. Don't mistreat women in the vicinity of Alex Louis Armstrong (or, as shown in a flashback, Roy Mustang). Don't mess with the members of Team Mustang if you don't want to feel the wrath of the rest of the team. And ''pray for deliverance'' if you're caught red-handed having something to do with the disappearance and possible murder of Riza Mustang, because if her husband doesn't incinerate you (and that's a really big if), their friends ''will.''

[[/folder]]

[[folder: ''Series/Glee'' ]]

* ''FanFic/HuntingTheUnicorn:'' If you mess with Kurt, Blaine will not hesitate to pick a fight with you. If you hurt ''Blaine,'' the Warblers will want to rip your kneecaps out. And if you [[spoiler: sleep with [[TheJailBaitWait sixteen-year-old]] Blaine, break up with him, and then string him along for weeks--''without correcting his notion that SexEqualsLove''--]]then his brother will threaten to burn you alive.
** Kurt doesn't take [[spoiler: Blaine's kidnapping]] very well.

[[/folder]]

[[folder: ''Western Animation/The Grim Adventures Of Billy And Mandy'' ]]

* Scott from ''[[http://tvtropes.org/pmwiki/pmwiki.php/Fanfic/TheSiblingRivalriesofScottandPenelope The Sibling Rivalries of Scott and Penelope]]'' goes absolutely berserk if you even DARE call him "Scotty".

[[/folder]]

[[folder: ''Franchise/Halo'' ]]

* ''{{Company0051}}'' has the TheCaptain of the eponymous Company. Basic inspection shows him as a calm, collected leader. Question how he runs the place, though, and he'll retaliate...

[[/folder]]

[[folder: ''Visual Novel/Katawa Shoujo'' ]]

* In ''Fanfic/LillyEpilogueFamilyMatters'', no one is especially fond of Mr. Satou insulting Hisao and Hanako, but Lilly takes it especially hard.

[[/folder]]

[[folder: ''Film/The League Of Extraordinary Gentlemen'' ]]

* It's a bad idea to mess with the members of [[TroperWorks/ThePrivateDiaryOfElizabethQuatermain Elizabeth Quatermain]]'s TrueCompanions, because the rest of them will make sure you regret it. And it's a very bad idea to mess with Elizabeth herself, because Skinner might not let you ''live'' to regret it.

[[/folder]]

[[folder: ''Video Game/Left 4 Dead'' ]]

* In ''VideoGame/Left4Dead'' fanon, Louis likes pills a ''lot''. Stealing his pills, or even having pills when he doesn't, will drive him into a frenzy.

[[/folder]]

[[folder: ''Franchise/Marvel Universe'' ]]

* [[FanFic/TheLifeAfterDeathTrilogy Otto and Robin Octavius.]] Do not threaten their adopted daughter Mouse. Just... don't. If you're lucky, Otto will rip you to shreds with the help of four sentient, pissed off metal tentacles. If you're not lucky... Robin Goodfellow gets to 'play' with you.

[[/folder]]

[[folder: ''Franchise/Mass Effect'' ]]

* Under no circumstances should you point a gun at Joachim Hoch in the ''{{Fanfic/Uplifted}}'' series Hanala'Jarva will ruin your day and not even feel an ounce of remorse for it.

[[/folder]]

[[folder: ''Western Animation/My Little Pony Friendship Is Magic'' ]]

* ''FanFic/GettingBackOnYourHooves'': [[SoreLoser Losing]] is one for [[TheChessmaster Checker]] [[ManipulativeBastard Monarch]] [[spoiler: and has been since [[CainAndAbel she and Trixie]] were foals.]]
* ''FanFic/InnerDemons'': Once she's taken over by her [[EnemyWithin Queen persona]], it becomes a very bad idea to betray [[FaceHeelTurn Twilight Sparkle]]. Or do anything that in [[AxCrazy her mind]] constitutes betrayal. Oh, and if you value your life, do ''not'' come between her and her [[VillainousIncest brother]].
* The author, [[http://www.fimfiction.net/user/kalash93 Kalash93]], has included a few throughout his stories.
** ''FanFic/RacerAndTheGeek'' has the term, foal killer, which is an NWordSubstitute that is explicitly stated to be so that being called one can be [[http://www.fimfiction.net/story/81159/racer-and-the-geek considered a salient defense for homicide.]]
** Luna's and Celestia's in [[http://www.fimfiction.net/story/85411/reflections Reflections]] are DoYouThinkICantFeel and trying to dodge questions, respectively.
** In [[http://www.fimfiction.net/story/90939/1/shell-shock/the-tower Shell Shock]], Shining Armor is extremely impatient and nasty to the FNG.
* ''Fanfic/PastSins'': [[HappilyAdopted Nyx loves Twilight.]] [[MamaBear Twilight loves Nyx.]] Both wield magical power unmatched by anypony save, perhaps, [[PhysicalGod Celestia and Luna.]] Do the math.
* ''[[{{Fanfic/Progress}} Progress]]'': Don't break Luna's glasses. Just don't. Also don't threaten anypony under her protection.
* ''FanFic/TheVinylScratchTapes'': If you mess with one of Octavia's friends, she will beat the crap out of you. If you mess with Octavia, Vinyl will call you a jerk, go out of her way to humiliate you, and then have ''security'' ([[spoiler:the Diamond Dogs]]) beat the crap out of you.

[[/folder]]

[[folder: ''Manga/Naruto'' ]]

* Two different villains in ''FanFic/AGrowingAffection'', while fighting Naruto and Hinata together, decide it would be easier to take out Hinata and fight Naruto alone. [[CurbstompBattle They were wrong.]]
* ''Blind'': Naruto's response to Kimimaro attacking his friends? Rip. Him. Apart. Piece. By. Piece. The mission report from the others clearly states the only thing left of Kimimaro was a skeleton.
* [[http://www.fanfiction.net/s/2938888/1/Legacy-of-the-Rasengan-I-Naruto Legacy of the Rasengan]]: Don't ever steal Naruto's jutsu. When Kakashi does it on accident, Naruto's willing to let it slide after he promises to never teach it to anyone. When Naruto sees Sasuke use it while fighting Gaara, Naruto drags Kakashi outside and is perfectly willing to put him in the hospital.

[[/folder]]

[[folder: ''Franchise/One Piece'' ]]

* [[http://www.fanfiction.net/s/8204172/1/ Strawhat Theater 2: Our Mrs. Monkey]], do NOT touch Luffy's wife.
--> ''Luffy'': "You're Absalom, right?"
--> ''Absalom'': "Of course I'm Absalom! Who else would I be, you idiot?"
--> ''Luffy'':"Gear Second."
--> ''Absalom'': "Gear wha-?" *gets punched through several walls*
** And when Absalom turns invisible:
--> ''Absalom'': "You might as well give up now, Strawhat! You can't hit what you can't see!"
--> ''Luffy'': "You're in the room, right?"
--> ''Absalom'':"OF COURSE I'M IN THE ROOM, IDIOT! You can't see me! But I'm clearly here!"
--> ''Luffy'': "Gear Third."
--> ''Absalom'': "Third wha-?" [[ThereIsNoKillLikeOverkill *Entire room gets punched through the rest of the castle*]]

[[/folder]]

[[folder: ''Video Game/Portal'' ]]

* Wheatley in the ''VideoGame/{{Portal 2}}'' fanfic ''[[http://www.fanfiction.net/s/6953776/1/Test_Of_Humanity Test Of Humanity]]'' still hates being called a "moron". However, it's also a '''very''' bad idea to say he's anything like the HAL 9000 or GLaDOS. And, whatever you do, don't you dare hurt [[spoiler:Chell]] or imply that he can't feel love because he's not really human. He may be a GentleGiant cyborg in the fic, but he won't hesitate to punch you in the eye [[spoiler:As GLaDOS found out]] if you so much as harm one hair on the [[spoiler:girl he loves]].

[[/folder]]

[[folder: ''Franchise/Power Rangers'' ]]

* Sean O'Callahan is a [[HairTriggerTemper walking one]] in ''FanFic/PowerRangersGPX'', particularly in the form of Daisuke Miyazawa, who keeps pushing it to his detriment. Eventually, [[spoiler: Daisuke pushes it so much that after he mutinies, he gets a massive punch from Sean and a big earful]]. He calms down more in subsequent episodes, but he keeps it subtle, especially in an alternate universe version when his alchemist enemy compares his alchemy to ClarkesThirdLaw.

[[/folder]]

[[folder: ''Anime/Pretty Cure'' ]]

* Yoko in ''Fanfic/FutariWaPrettyCureBlueMoon'' cannot stand destruction of property and is often set off ranting about it... like the time she walked up to the MonsterOfTheWeek in the middle of a battle and lectured it about the mess it made. Oh, and you might not want to remind Kainatrol of her [[CainAndAbel sister]] unless you know what you're doing.
* ''FanFic/FutariWaPrettyCureDragon'': The man in black does not like being called a "super spade" simply because he acts like a stereotypical Mexican even though he isn't Mexican in any sense of the word. Go ahead, call him that [[RuleOfThree three times]]. He'll go batshit on the poor sap who's unlucky enough that the third instance of that phrase in a single episode comes out of his mouth.

[[/folder]]

[[folder: Real Person Fic ]]

* Harm an animal, or one of the others, around Paul in ''Fanfic/WithStringsAttached'' and he may quite violently stop being an ActualPacifist... though he has such a horror of hurting anyone that it's not too hard to talk him down.
** All of the four have a BerserkButton if one of the others is threatened. Certainly John laid some heavy (tho' nonlethal) offscreen [[MakingASplash water]] whoop-ass on a handful of Raleka after George was badly injured falling through a roof. No matter that none of the Raleka had anything to do with this... but they ''were'' approaching in a slightly threatening manner.
*** Given that John had just been awakened from an enchanted sleep by George peeing on him through said roof, had no idea what was going on save that it was bad, and was ''pissed as shit'', he seems justified in attacking anything that moved at that point.
** The only time in the book that Paul followed through on an attack was when the Hunter's {{BFG}} threatened the others.
** Ringo immediately threw As'taris back when he threatened John.

[[/folder]]

[[folder: ''Series/The Sentinel'' ]]

* A common sentiment in ''The Sentinel'''s fandom is "The only thing more dangerous than a Sentinel whose Guide is threatened is a Guide whose Sentinel has been hurt."

[[/folder]]

[[folder: ''Franchise/Sherlock Holmes'' ]]

* Don't mess with SherlockHolmes or [[TheWatson Dr. Watson]]. Seriously, don't. If you hurt one of them, the other one ''will'' come after you, and it won't be pretty. And, for the love of heaven, do ''not'' beg [[DeadlyDoctor Watson]] for mercy if you played a part in Holmes's long-term imprisonment. [[Fanfic/DeliverUsFromEvilSeries You will probably end up dead.]]

[[/folder]]

[[folder: ''Franchise/Sonic The Hedgehog'' ]]

* Don't tease [[SonicTheHedgehog Tails]] in ''Fanfic/JourneyIntoDarkness'' about Cosmo's death if you know whats good for you, Shadow learned this the hard way.
** In fact, Tails seeing Shadow in general pushes his beserk button.

[[/folder]]

[[folder: ''Franchise/Star Wars'' ]]

* In one ''{{Knights of the Old Republic}}'' [[http://www.fanfiction.net/s/2344822/2/Destinys_Pawn_Leviathan fanfic]], Saul Karath isolates Carth while his Dark Jedi honor guard interrogates [[spoiler:Revan]] and Bastila. After trying the WeCanRuleTogether tactic (which fails miserably), he proceeds to test every BerserkButton Carth has. [[PapaWolf Carth holds it together pretty well, until Karath mentions what he plans on doing to Mission]]...

[[/folder]]

[[folder: ''Video Game/Super Mario Bros'' ]]

* ''FanFic/ClashOfTheElements'': For Joe Dark, ANYONE defending Alex Whiter is this for him.
** As Part 2 reveals, [[spoiler: Anyone performing a futile HeroicSacrifice is this for Driad]]
** Never, NEVER UNDER ANY CIRCUMSTANCES, [[spoiler: Mess with Ezekial Gaia's beard. [[{{DishingOutDirt}} Considering his powers]], [[{{UnstoppableRage}} the results are not pretty]]]]
** [[spoiler: Chaos Alex]] goes completely berserk after [[spoiler: Alex insults his mother's (Cackletta's) name one too many times]]

[[/folder]]

[[folder: ''Video Game/Touhou'' ]]

* Amongst ''VideoGame/{{Touhou}}'' fans, a lot of portrayals of [[NinjaMaid Sakuya]] have her react [[KnifeNut incredibly violently]] if anyone implies that she pads her bra, or even writing or ''thinking'' the word "pads". She also doesn't like people who sleep on the job, which is bad news for [[TheSlacker Meiling]]. None of this, however, comes close to what she'll do to you if you mess with her ''ojou-sama'', as Yukari found out in ''VideoGame/KoumajouDensetsu II''.
** Being cheated out of donations is one of the surest ways to piss off Reimu in fanworks, and has been the source of more than a few "Digging Your Own Grave" pics on Danbooru.
** Patchouli likes to ThrowTheBookAtThem on occasion in the fighting games, but as ''TouhouMusouKakyou'' demonstrates it's ''not'' a good idea to do the same to her. When Aya does this accidentally, it sets up a ''big'' throwdown between her and Reimu.
** Calling [[TimeAbyss Yukari]] any variation of "old hag" is a good way to be sucked into one of her gaps. [[{{Memes/Touhou}} She's 17]], after all.
** Very few things can piss [[CuteGhostGirl Yuyuko]] off, but two things, according to fanworks, will do it: interrupting her meal may get you put through a wall, but stealing her food will make her go Hollow on you.

[[/folder]]

[[folder: ''Western Animation/Toy Story'' ]]

* Hurting or nearly killing [[WesternAnimation/BuzzLightyearOfStarCommand Buzz Lightyear's]] [[Fanfic/ForGood adopted sis]] is ''not'' a good idea, even if you're the [[EvilOverlord EVIL Emperor]] [[ArchEnemy Zurg.]] [[TheCaptain Captain Lightyear]] takes his role as a [[BigBrotherMentor big brother]] ''[[BigBrotherInstinct very]]'' [[BigBrotherInstinct seriously.]]

[[/folder]]

[[folder: ''Video Game/Warcraft'' ]]

* In ''[[http://www.fanfiction.net/s/4599507/1/Tales_of_a_Warrior Tales of a Warrior]]'' its safe to say that as of chapter five you should never, ''ever'' threaten Ayuri when Keleria is around. The 'berserk' is complete with {{red eyes take warning}} and {{laughing mad}}.

[[/folder]]

[[folder: ''Video Game/The World Ends With You'' ]]

* Eri, Shiki's best friend, in ''[[FanFic/ErisGame Eri's Game]]'' has one when she will attacking anyone who tries to hurt or insult Shiki. The beating with [[spoiler:Beat, who is a Reaper]] really does it.

[[/folder]]

[[folder: Unsorted ]]

* ''FanFic/TheyJustDontCareAnymore'': If you value your life, you [[ItMakesSenseinContext won't ever confuse Air Raid for a Canadian chick]], or ask [[PlayingWithFire Inferno what beats napalm]].
* [[FanFic/IryaSheenAceAttorney Irya]] gets rather noticeably angry when called a child.
* Go ahead, burn Meciel's silk sheets. Then run.
** From the same fanfic series, Harry gets violent very fast when people insult Meciel.

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