95% of the time I'm rather calm. When I get angry I talk louder and have an extremely aggressive and sarcastic-like tone of voice, but that's it. I've never actually hurt anyone or anything due to my own rage.
Maybe I can describe it a bit better than that.
level 0 - Normal. No emotion, neither internally nor externally.
level 1 - Slightly annoyed, but no visible signs of annoyance.
level 2 - Somewhat ticked off. May show visible signs of anger.
level 3 - Ticked off. It's best not to argue with me at this point.
level 4 - Intensely frustrated. I lose the will to filter myself, and often say offensive things I later regret.
level 5 - FUBAR at this point. This is when I start wanting to hurt people, but luckily it doesn't happen very often.
_________________
Remember, all atrocities begin in a sensible place.