I'm totally not a violent person, but it seems like a few times a year I just have to hit a wall or slam a door or throw something against the wall. I can also think of a few times where I have gotten in a car, driven to the middle of nowhere, gotten out, and screamed as loud as possible to the point where I'm almost in pain and eventually start laughing as I realize how absurd what I'm doing is.
I guess that's the result of bottling everything up and being afraid to tell anybody when I'm angry. Everybody I know sees me as the super mellow, laid back guy...it would be hilarious to them to see me in a field screaming my head off at the universe.
Anyway, hope you feel better.