The bmw driver had options, pull over and get the ass off his ass, slow down and let him pass, or out-drive him. Road rage is a serious issue, he's lucky he got to walk back to his car. Never get out of your car and engage someone still sitting in their car. Firearms, mace, asp's, knives, and hand to hand will get you in serious trouble. I'm not saying who was right and who was wrong, just be safe and go home each night.