I've just been re-reading some things here and thinking of ways to further enrage drivers behind me who are honking and being imbeciles for no apparent reason. I've already found the "turn around and smile and wave" move to really send them over the edge.

I also think turning around and putting a finger up to one's mouth and doing a long "shhhhhhhhh" move with a smile would cause them to bang their head on the steering wheel. Anyone want to experiment with this and get back to us?