i'm ENTP too, but since another one posted saying something different, then i figured i'd speak up and say how:
it takes a lot to truly piss me off too (most of the time, it's over a perceived injustice-either against me or someone truly defenseless-this can come in a variety of forms), so it usually only happens if i feel totally in the right.
i tell them exactly why i'm pissed and if pissed enough, i'll do it in a very belittling, usually loud (for maximum humiliation) fashion, thus forcing them to either back the hell off or continue the fight. if they choose the latter, then being that i'm confident i was right to be pissed (since, again, it takes a LOT), then it's "go time". at that point, i figure they deserve whatever they get as they chose continue it, and i finish it via whatever means they choose to take it.
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