Several years ago, a car full of college kids scared the crap out of me by pulling up alongside and yelling at me and then laughing like crazy. They sped up and got about 2 blocks ahead and then got caught by a red light. They didn't realize that I was catching up with them as they were stopped. As I pulled up alongside, I leaned my head inside the rear window and yelled at the top of my lungs. I've never seen people jump so hard. One of my all time favorite stories.