I was driving down 19th Street in the pouring rain this evening when I saw a young man in a flannel shirt crossing the street — about a block up. He had the sort of odd gait that I associate, for some reason, with brain damage. He started giving the finger to passing cars. As I got closer, I waved to him. He started angrily giving me both fingers. I waved some more, and we slowly passed each other by, he emphatically flipping me off and I smiling like a friendly idiot and waving.