Breathe. Take a second to sit back, and remember who you are, and that it's just the illness (or whatever you want to call it) talking. Those whacked out neurotransmitters. Take a deep breath. I used to think that it was cheesy, and cliche, but it has helped me so much with that knee-jerk, "I really really want to punch you in the face" reaction that you are talking about. I get it too...