excellent!

or when the lady that rudely honked at me from behind ends up waiting at a traffic light with me coming up beside her. After she honked (and i got over being startled) I waved at her like we were old friends.
SO when i pulled up next to her I waved and looked into her car expectantly.
She looked out the other window... i got a real laugh out of that one. Embarrassed her.. by being friendly.