Quote Originally Posted by tulip View Post
Wave to them and smile like you know them. It might make them think that you know them. At the very least, smiling will make you feel better.
I learned to do this when driving in Boston. Aggressive drivers often get really pissed when you wave or blow a kiss at them after they've done something stupid or jerk-ish. Plus, it always made me laugh and that just makes me feel better!