I agree the helmet should have stayed on. Guess the guy thought he would make it a fair fight. 2 against 1. ha
I had to wonder what happened. It seems the car was already upset with the biker and pulled in front to make a point then got out to deal with him.
I thought about putting a camera on the dash if for nothing else so I can have video proof of the accident for the insurance company and leo's(provided it is the other persons fault; if it is mine, I can plea the 5th).