Great thread! Here's one I posted last year...
Good story. Just be careful. People in cars act like such jerks sometimes, just because they can. I myself have had to chase down cars a couple of times. Once a pickup with 2 teenage boys pulled up along side me and yelled out the window, which scared the ???? out of me. Then I noticed a busy intersection ahead and sprinted until I thought I was going to throw up. Just as they were coming to a stop at the stop sign I pulled right up to the passenger window and yelled into the cab as loud as I could, which caused both of them to jump in their seats. Then they too off. It was one of my best biking moments.

I felt big when I got home. Another time I ran down a car and cheerfully explained to a woman that the 2 young boys in her back seat were making obscene gestures to me as they went by. I would have liked to stick around to see how that turned out. I try to chase down people when they cut me off or yell at me, which is probably a stupid thing to do, but it always seems like a good idea at the time.
Tom