Jeffy: "You're not gonna believe this: I was mowing my lawn the other day and...I smelled something...burning. I looked over to see poor Sparky engulfed in a ball of fire, yelping for help......but by the time I reached him he was utterly consumed and only his ashes remained. That's what happened to Sparky. I'm not lying, it was Spontanious Animal Combustion Bob."
Getting really mad all of a sudden and doing something regrettable. AKA flying off the handle.
Sometimes I feel this urge for spontaneous combustion, but then I try to think to myself, "how will this fix the situation" and "what if I hurt someone, or do something very regrettable." I try to do something else instead, like take a walk or maybe play some basketball or play Halo.
When a male, typically going through adolescence, accidentally busts a nut for no reason.
Adam: Did you see what happened to Rick? We were in math and he accidentally cummed in his pants for no reason.
Dan: Shit bro, spontaneous combustion isn't it