Who knows what was going through this guy's head, but there's a dash-cam video out of Russia that shows a man on a motorcycle cutting off a car.

Then he slams on his brakes for some reason, the car NAILS him  and he ends up in a pretty nasty crash.

It happens at 1:07. And notice how at 1:37, the driver of the car casually checks the damage to his front bumper BEFORE he checks on the motorcycle guy.