History BerserkButton / FullMetalAlchemist

** Even funnier, in one particular scene in the Brotherhood Anime, Selim hits this one of Ed's Berserk Buttons, [[SugarWicki/FunnyMoments and then LAMPSHADES Ed's reaction IN THE VERY SAME SCENE!]]

** Even funnier, in one particular scene in the Brotherhood Anime,[[spoiler: Pride averts this one of Ed's Berserk Buttons, [[CrowningMomentOfFunny only to do a complete 180 and push the bigger one IN THE VERY SAME SCENE!]]]]

* Izumi seems to have a few of these, and they seem to be set on a hair trigger. Don't call her old. Or hit on her when her husband is around. Just because he's a GentleGiant doesn't mean he can't beat you to a pulp when provoked.

* Perhaps Ed's most famous Berserk Button is any mention of his [[TheNapoleon vertical deficiencies]]. He usually ends up exaggerating the insult to ridiculous extremes as well as whooping the ass of the offender. The only one he won't go nuts on is Al (after all, they're brothers...and someone has to keep him in line), and even ''he'' got away with a knock on the head and a retort of "Don't call me small." Of course, the short rants are constantly a CrowningMomentOfFunny.

* Do NOT bring up the human transmutation incident with either of the brothers. Especially if you're doing it to claim that they're [[NotSoDifferent no different than you]]. This one very nearly got Shou Tucker killed when the two learned of [[spoiler:his horrible act of fusing his daughter Nina with her dog]], shortly before [[spoiler:Scar finished the job and put his chimera out of its misery]].

* He doesn't take kindly to being reminded that he's useless when wet.

* What it says up there for Roy Mustang regarding Riza Hawkeye? It goes the other way too. She's not BodyguardingABadass for nothing.

* Ed and Al share a minor (in Al's case, not so minor for quite a while) one that is labeled "Pointing out how GREAT it actually is being a soul trapped in a suit of armor". It led to one pretty not-so-nice brother fight.
* Do NOT bring up the human transmutation incident with either of the brothers. Especially if you're doing it to claim that they're [[NotSoDifferent no different than you]]. This one very nearly got Shou Tucker killed when the two learned of [[spoiler:his horrible act of fusing his daughter Nina with her dog]].

* Do NOT bring up the human transmutation incident with either of the brothers. Especially if you're doing it to claim that they're [[NotSoDifferent no different than you]]. This one very nearly got Shou Tucker killed when the two learned of [[spoiler:his horrible act of fusing Nina with her dog]].

* He doesn't take kindly to being reminded that he's useless when wet.

* Also, don't suggest that [[SheIsNotMyGirlfriend Winry is his girlfriend.]] At the same time, however, don't even ''think'' about harming a single hair on her head... because Ed will ''kick your '''ass'''''. Like the narrator in ''Brotherhood'' says, [[DeclarationOfProtection he will do anything to protect her]].
* Don't touch his little brother Alphonse either.
* Also, he really, ''really'' [[DoesNotLikeSpam hates milk]]. [[FridgeLogic Possibly in relation to his... height issues]].

* Don't imply that you're attracted to Riza Hawkeye, or mess with her in any way, shape or form. In the manga, Barry the Chopper declares that he's in love with Riza (because she shot at him instead of screaming in terror). Then he makes the mistake of putting his hand on her waist, clearly against her wishes, in front of Roy.
-->'''Roy:''' ''[[CrazyJealousGuy *literally growling, eyes on fire*]]'' Stand aside, Lieutenant... there's going to be a ''fire'' tonight.
* Don't hurt his subordinates. He hand-picked those five soldiers for a reason and they are his ''family''. He has no problem with tearing across town and jeopardizing a secret mission if any of them are in danger.
* And don't let him find out that you're the one who [[spoiler:murdered his best friend]]. ''Nothing'' will save you.

** The human transmutation incident is also not a good thing to bring up with either of the Elric brothers. When Shou Tucker, who had already [[spoiler:fused Nina with her dog Alexander in a horrible crossing of the MoralEventHorizon]] brought it up in an attempt to imply that he and Ed were NotSoDifferent, it led to a vicious NoHoldsBarredBeatdown by Ed, who came very close to ''killing him'', followed by a soft-spoken warning from Alphonse that Tucker needed to stop talking.

* Do ''not'' mess with Greed's "[[IJustWantToHaveFriends possessions]]".
* Don't ''ever'' insult Hohenheim's sons.

* Also, don't suggest that [[SheIsNotMyGirlfriend Winry is his girlfriend.]] At the same time, however, don't even ''think'' about harming a single hair on her head...because Ed will ''kick your '''ass'''''. Like the narrator in ''Brotherhood'' says, [[DeclarationOfProtection he will do anything to protect her]].

-->'''Roy:''' ''[[CrazyJealousGuy *literally growling, eyes on fire*]]'' Stand aside, Lieutenant...there's going to be a ''fire'' tonight.

** The human transmutation incident is also not a good thing to bring up with either of the Elric brothers. When Shou Tucker, who had already [[spoiler:fused Nina with her dog Alexander in a horrible crossing of the MoralEventHorizon]] brought it up in an attempt to imply that he and Ed were NotSoDifferent, it led to a vicious NoHoldsBarredBeatdown by Ed, who came very close to ''killing him''.

* For the love of Truth, don't gloat about [[spoiler:Maes Huges' death]]. There is a ''reason'' why the resulting rage is listed under [[NightmareFuel/FullMetalAlchemist Nightmare Fuel]].

--->'''Roy:''' ''[[CrazyJealousGuy *literally growling, eyes on fire*]]'' Stand aside, Lieutenant...there's going to be a ''fire'' tonight.

* Do ''not'' ever kill one of his closest friends. Seriously, just don't. And if you go the extra mile of mocking their death, or [[spoiler:taking on their form in a ShapeshifterGuiltTrip just to try to fuck with him]], this will only make things worse for you. Isn't that right, [[spoiler:Envy]]?

* Try to abduct Izumi's apprentices. No, really. Go on. Try. But better have your will signed first.

* Scar does not take well to anyone involved in the Ishvalan genocide. And "does not take well" means "will ''[[YourHeadASplode dissolve your head]]'' via FacePalmOfDoom."

** The human transmutation incident is also not a good thing to bring up with either brother. When Shou Tucker, who had already [[spoiler:fused Nina with her dog Alexander in a horrible crossing of the MoralEventHorizon]] brought it up, it led to a vicious NoHoldsBarredBeatdown by Ed, who came very close to ''killing him''.

* Don't imply that you're attracted to Riza Hawkeye. In the manga, Barry the Chopper declares that he's in love with Riza (because she shot at him instead of screaming in terror). Then he makes the mistake of putting his hand on her waist, clearly against her wishes, in front of Roy.

* Do ''not'' ever kill one of his closest friends, seriously, just don't. Envy learned the hard way.

* Perhaps Ed's most famous Berserk Button is any mention of his [[TheNapoleon vertical deficiencies]]. He usually ends up exaggerating the insult to ridiculous extremes as well as whooping the ass of the offender.
* The only one he won't go nuts on is Al (after all, they're brothers...and someone has to keep him in line), and even ''he'' got away with a knock on the head and a retort of "Don't call me small." Of course, the short rants are constantly a CrowningMomentOfFunny.
* Take note, at one point, he thought to himself that he was lucky being so small made it easy for him to crawl through air ducts. ''He had to fight the urge to punch himself in the face.''

* Threaten [[BigBrotherInstinct his little brother Al]] while Ed's around and you'll find yourself very, very, VERY soon regretting it.
* It's also not too much of a good idea to bring up memories of the human transmutation incident for laughs, although this was more of a TranquilFury in the first episode of ''Brotherhood''.
--->'''Ed''': You know...there are some lines you really shouldn't cross.
* The closest Ed ever comes to killing someone is when he has [[spoiler:Shou Tucker]] up against a wall after Ed realizes he [[spoiler:used Alexander ''and'' Nina for his chimera experiment.]] He might have let him go if [[spoiler:Tucker]] hadn't decided to show us all what a bad idea it is to laugh at Ed's worst memory. He was on the road to getting pummeled to death with a steel fist before Al pulled his brother off.

* Much like Ed with Winry, it is a very bad idea to even imply that you might harm Riza Hawkeye. Your only chance of surviving such an implication is if he is heavily restrained.
** Don't imply that you're attracted to her, either. In the manga, Barry the Chopper declares that he's in love with Riza (because she shot at him instead of screaming in terror). Then he makes the mistake of putting his hand on her waist, clearly against her wishes, in front of Roy.

** Oh, and don't suggest that she really enjoys killing, like Kimblee did when they were all serving in Ishval. Riza in a CornerOfWoe makes for one really pissed-off Roy.
** On the whole, just don't mess with Hawkeye in any way, shape, or form. You run the risk of literally dying in a fire.
* Roy is generally a [[TheChessmaster Chessmaster]] who [[JerkAssFacade pretends that he is]] [[ObfuscatingStupidity only concerned with pursuing career advancements and chasing girls shamelessly.]] But if you dare to harm his comrades, he'll give you hell for all he's worth. [[PlayingWithFire Literally.]]
* Mocking the death of Roy's best friend, [[spoiler:especially when you're the killer,]] is another excellent way to ''seriously'' piss him off. And [[spoiler:trying to take on his form in a ShapeshifterGuiltTrip]] just to fuck with him? You're only making things even worse.

* Izumi seems to have a few of these, and they seem to be set on a hair trigger. Don't call her old.
* Or hit on her when her husband is around. Just because he's a GentleGiant doesn't mean he can't beat you to a pulp when provoked.

* You shouldn't lie to Hawkeye about Mustang being dead. Even more specifically, you should not lie about being the one to kill Mustang. And ''never'' smile about it. [[NotSoStoic The result is not pretty.]]

* Don't threaten or try to kill the first anime version of Sloth. Wrath will go BERSERK on you.
* [[BadassArmy Not that they really need it]], but messing with the Briggs Bears will [[MamaBear earn you the immediate, violent wrath]] of [[FourStarBadass Olivier Mira Armstrong]].
* Gluttony is usually a PsychopathicManchild who just doesn't ''get'' that eating people isn't very nice, but hurt [[LivingEmotionalCrutch his beloved]] Lust and watch him completely flip out.

** When [[spoiler:Dr. Marcoh]] admitted to Scar that he not only helped in the Massacre but also experimented on Ishvallan/Amestrian soldiers he promptly asked Scar to kill him. Scar didn't because his knowledge of Alchemy would be useful, but did beat him up and then ''melt his face''. So... don't push Scar's BerserkButton.

* See the mention up there on Ed's list about bringing up the human transmutation incident? See how Al had to pull Ed off of the guilty party? If that's you, don't ''continue'' to harp on the subject after Al has restrained his big brother... because then you run the risk of pushing ''Al's'' button, and Al is very nearly the poster child for BewareTheNiceOnes.
* Harming [[PapaWolf Hohenheim's]] kids is the worst idea, ever. Hell, just insulting his kids is enough to send you straight into an asskicking.
* Any open or implied disrespect of Ling in front of his vassal Lan Fan will result in her giving a DeathGlare to the person responsible, at the very least, or her attacking the offender.

* The FANDOM has one of these. As a general rule of thumb, never, ever, ever joke about [[spoiler:Nina. "...Da...ddy..."]] The proportion of fans to this day that will shout "Not COOL, DUDE," is astounding.

* Mocking the death of Roy's best friend, [[spoiler:especially when you're the killer,]] is another excellent way to push his button.

* Do ''not'' mess with Greed's "[[OrangeAndBlueMorality possessions]]".

* Do ''not'' mess with Greed's "[[JerkassFacade possessions]]".

* You shouldn't tell Hawkeye that you killed Mustang (even if it's not true). [[NotSoStoic The result is not pretty.]]

* Also, never criticize her handiwork. After hearing someone insult her automatic craftsmanship in the first anime, Winry went from telling Ed to calm down to telling Al to let Ed go so he could (more or less) kick the guy's ass.

* Don't imply that you're attracted to her, either. In the manga, Barry the Chopper declares that he's in love with Riza (because she shot at him instead of screaming in terror). Then he makes the mistake of putting his hand on her waist, clearly against her wishes, in front of Roy.

* Oh, and don't suggest that she really enjoys killing, like Kimblee did when they were all serving in Ishbal. Riza in a CornerOfWoe makes for one really pissed-off Roy.

* Chapter 93 of the manga shows that mocking the death of Roy's close friend, [[spoiler:especially when you're the killer,]] is another excellent way to push it.

* Harming [[PapaWolf Hohenheim's]] kids is the worst idea, ever. Hell, just insulting his kids is sending you straight into an asskicking.

* [[{{ActionGirl}} Lan Fan]] if you insult/belittle/threaten [[BodyguardCrush Ling]].
* Similarly (though perhaps less explosively) telling Ling his underlings or anyone else he cares about are [[WeHaveReserves expendable]] will ensure you an angry Xingese prince.

* Take note, at one point, he thought to himself that he lucky being so small made it easy for him to crawl through air ducts. ''He had to fight the urge to punch himself in the face.''

* Oh, and don't suggest that she really enjoys killing, like Kimbley did when they were all serving in Ishbal. Riza in a CornerOfWoe makes for one really pissed-off Roy.