Berserk Button/Playing With

Basic Trope: Something that sends a character into a violent rage.
 * Straight: Brad, normally the Only Sane Man, turns violent when somebody calls him a bastard.
 * Exaggerated:
 * Brad, normally the Extreme Doormat, turns into a blood thirsty psycho when somebody messes with his shoes.
 * Hair-Trigger Temper
 * Justified:
 * Straw that broke the camel's back -- or a violently sensitive topic.
 * Brad's shoes were custom made for him by a dear now-deceased friend just before they died, the shoes now serve as a symbol of the lost friendship.
 * Inverted:
 * Brad being called a bastard causes him to mope.
 * Alternatively Brad is The Berserker when he's not baking, referring to pastries really mellows him out.
 * Brad usually has Hair-Trigger Temper when it comes someone talking to him unless someone calls him imbecile at which point he doesn't care.
 * Subverted: Brad looks like he's going to snap, but he doesn't...
 * Double Subverted:
 * ...but then some more jeering sends him down the deep end completely.
 * Or it just looks like he didn't snap, because he went into Tranquil Fury.
 * Zig Zagged: After being pushed too far, Brad picks a fight with the scoundrel but is horribly outmatched. Now his face makes his shoes look intact by comparison.
 * Parodied: Brad's occasionally driven to violence, even to the point of challenging someone to a chicken race once, whenever someone messes with his shoes.
 * Deconstructed: Brad's reaction to his Berserk Buttons get him into deep trouble with horrifying consequences for all.
 * Reconstructed: ... but he has made sure NO ONE will ever make fun of his shoes again
 * Averted: The things that would be Brad's berserk buttons don't bother him at all.
 * Enforced: The writers want to show that even nice guys can break.
 * Lampshaded: "Don't do that. He'll break your neck if you do."
 * Invoked: "I heard that he's sensitive about his shoes. Let's spill mustard on them and see what happens!"
 * Exploited:
 * Jack, the hero, uses Bob's Berserk Button to take down the Dark Lord.
 * A villain uses Bob's Berserk Button to get him in serious trouble with the authorities or get him killed.
 * Defied: "You think that's going to piss me off?! Ha! You're wrong!"
 * Discussed: "Just...don't mention that one thing around him. Trust me on this one, okay?"
 * Conversed: "Oooh, that character is being set up as an idiot." "How do you know?" "He just called Brad a bastard... a second time."
 * Played For Laughs: Bob's Berserk Button itself and/or his reaction when it gets pressed is utterly ridiculous.
 * Played For Drama: Bob's Berserk Button leads to someone getting hurt or even killed, leading to everything going to hell for him.

Don't go back to Berserk Button, OR I WILL BREAK YOUR FACE BITCH!