I've never seen this - Wow, what a dick move . I bet he really "gets it" in jail by some old biker dudes.
Was something else going on here??? - did 10 other sport bikes pass that dumb bastard at 150mph on one wheel (?) to get him that angry?
I highly doubt he saw that motorcycle (in his rear view / side view mirror) and had time to react like that if it was the first bike in a group. The timing was too perfect - unless he had seen it before - like he was waiting for that bike.
Be careful out there and don't be a dick.