Found this video on youtube. In all fairness, it doesn't show what happened before the tape started rolling, but given the actions of the driver in the eclipse I'd probably point the finger at him. Note alleged jerkoff pushes biker, then alleged jerkoff nearly sideswipes biker, and alleged jerkoff finally cause biker to crash.
YouTube - VEGAS ROAD RAGE
This is why I would never get a concealed weapon permit. I'd be in prison after dealing with someone like this. Oh, and the music is ridiculously stupid on this video.