Anyone else have ridiculous rage at times?

[Wren57]

Most of the time I'm the most laid back guy around, and all my friends can attest to that; there are times, however, when I literally feel as if I'm about to snap. I don't mean this in jest or anything like that... there are seriously times when I feel as if I am about to be overcome with rage... and it isn't really at any one person or group of people, I wouldn't kill anyone or anything like that... just snap, just completely, totally snap and go insane about things that I can't control or influence... there are certain things in my life that are of utmost importance, and I've been blocked out by those things and it makes me so mad I just don't know what to do sometimes... anyone else have sporatic rage?