Years ago in DC I had a near accident with a taxi driver who wasn't keen on my rights to be on the road. At a traffic light I pulled up next to the drivers side of the cab and leaned over to let the driver know what I thought of his driving. As I leaned over I grabbed the rear view mirror which promptly came off the car in my hand, I really wasn't trying to break anything. I tossed mirror in the drivers lap and told him to watch it or some such, and he ran the light I suppose in fear that after breaking off his mirror I was coming after him.