Hmm, I don't blow up on people often, but when I do it is often memorable, most recently, I was asked to do something I disagreed with by a manager for a company I no longer work for. I'm pretty flexible person, so I figured I must be misunderstanding the purpose of the assigned task, so I pressed my manager for a reason, she dodged the question for a while then snapped at me saying, "You'll do it because I said so."
Well, I'd had enough of her shit, so I went into a rant I can still remember to this day:
"Not f---ing good enough lady, only two people on this planet get to use "because I said so" on me, and you are neither old nor mean enough to be -either- of my parents. so if you can't answer a simple f---ing question then you can find yourself a new f---ing cook."
Needless to say, this is one of the major reasons I no longer work at this place. (And for the record, upon hearing the story and what I said, my parents couldn't stop laughing about it for a week.)