Gotta wonder if he didn't deserve it. Here's a little story for you:

When I used to ride motorcycle home from work at about 2 am on the highway a guy tried to kill me. He passed me half in my lane so I honked at him. He brake checked my, I swerved around. He got alongside me and tried forcing me into the wall. I outmanuevered and stopped. When he continued on I decided to follow him home and shoot him. I always carry. When I followed him home he had a wife and kid with him so I decided I'd just trash his car. All told I left the car totaled without a doubt, trashed the outside of the house, then threw a huge rock through the master bedroom window and rode off. See, sometimes people do things that need punishment to cause then fear. I left him a note saying who I was and I knew how to find him if I ever got the feeling he tried to road rage again. Sometimes other motorists try and kill you, and theres nothing more satisfying than terrifying them for their safety in return.