that sucks. dude was shitty. I wouldn't have been that nice if he was acting like that to me. I've been rearended by a cop in my car, and the guy was super nice. Walked up asked if everyone was OK, apologized, admitted fault, asked if i wanted to file a report. He scuffed up my paint a little bit, but it was an old crappy car anyway, so I said don't worry about it, we're good. However, to be honest, if the dude approached me like that I would have demanded a report and given him a good lesson about being nice to people after you hit them with your car.