What is the rudest thing another drive have said or done to you?

[honeychile]

When I was about 18, I was in a hurry to get somewhere, and the little old lady driving behind me was going about 10 miles an hour (seriously - that's what I was doing!). Impatient, I was right behind her, until she pulled over, and motioned to me to put down my window. I did, and in the nastiest voice she could muster, she said, "Tail Gater!" in a voice that's usually reserved for comments about mother comments.

I laughed, but deep down inside, I felt bad about it.