I too have experienced that sort of anger, far too many times in my life. Until I was diagnosed w/ bipolar, I (and everybody else in my family) kind of thought I was possessed whenever I got like that---total, irrational, both-barrels anger. And usually over stupid trifles, like being cut off in traffic.

One time many years ago, my husband got into an argument with a guy over what the guy thought was getting screwed on a car repair job my hubby had done. They were out in the parking lot of our apartment complex, yelling and threatening each other with fists, and I literally saw red. I grabbed a garden hoe and went after him with it. All three of us were moving in a circle, me with the hoe ready to strike, my husband trying to get me to back off, and the guy looking scared out of his gourd and begging me to leave him alone.

Finally, he backed away, only because he was just about to pee down his leg at the sight of this crazy woman looking to brain him with a garden instrument. But if he hadn't, I'd probably still be doing 25 to Life because I was THAT pissed.

Now that I'm on meds, my road rage is all but nonexistent, and I look back on that time some 30 years ago and think "Why the fritz was I willing to lose my freedom over some D-bag like that?!"