Depends on the situation. But generally:
First stage: cold, quiet, locked down. I'm trying not to say anything I'd regret. My eyes are probably bugging out because I really, really want to fly off the handle and verbally assault you, but I know I shouldn't because it'd cause a huge messy ordeal.
Second stage (sometimes this just bypasses the first): Solar flare-esque emotional outburst. I say something that doesn't quite make sense, or it does make sense but there is more emotional charge to my words that I intend to use. I do this sometimes when someone is being completely ridiculous and I react more strongly to emotions that I didn't even consciously realise I was feeling. Or, I could be frustrated and might be saying things that aren't very kind to unsuspecting people.
Third stage: Blow up of the nuclear missile sort. By this point I have passed the threshold of all rational thought and have descended headlong into a rampage of anger/frustration. At some point, even the rampage isn't enough to express everything that's been bottled up and I start to cry at the same time I'm mindlessly shouting at someone.
Fourth stage: Cool-down/personal flogging. This happens whenever I get upset. Sometimes I don't even go through a blow-up for this to happen. All I have to do is be the slightest bit rude to someone and I'll start flogging myself for being a monster. Usually a lot of crying and hiding somewhere where no one will find me for a while and feeling sorry for myself. Whoever might have upset me in the first place is immediately made innocent and everything is my fault.
Keep in mind that I really don't blow-up very often but I do do all the other things from time to time. Especially when I'm feeling generally down for reasons I don't understand. People rarely ever see the pathetic/outraged stuff, though.
Stage 5: ww2 germany