Like I said in a previous post, eyewitnesses said that what you see in the video is only the very end of what happened. Before the video starts, the car tried to exit the carpool (HOV) lane and didn't see the motorcycle crowding the painted line. Guy on motorcycle almost crashes, then gets pissed starts road-raging on the car. He was kicking the passenger side of the car several times before the video even starts. Then what we see in the video, is where he fell back behind the car, then sped up on the driver's side and kicked it again. The kid in the car probably thought his car was getting hit again on the other side, because that was the side where the biker started the craziness. So he swerves away and loses control.

Like I said, eyewitnesses tell a completely different story than what you see when the camera starts rolling. They also said that the biker was antagonizing OTHER drivers before this one happened.

Also, you kick/punch/throw something at a moving car in California and you're going to be arrested for assault. You leave the scene of an accident and you're getting arrested for hit and run. The motorcyclist is in for a world of legal trouble when they find him.