Good grief Charmion, what a dreadful thing to do - punch someone in the face, when the driver was in the wrong being on a pedestrian crossing in the first place!
I don't agree Steve that aggression is an irrevocable part of human nature. We're civilised human beings not wild animals, and if someone is incapable of controlling their aggression they certainly shouldn't be in charge of a car (or even at liberty at all!).