Nasty road rash. This is why you always wear thick leather when you ride a bike. Of course a real bike rider wouldn't showboat like that either. So he got what he deserved.
A friend of mine had a bike when he was a teenager. He was smart enough to wear his helmet and leather coat and he had some leather pants for riding (they actually had some shit in there for his knees, iirc). He bitched about it, particularly in the summer, but he didn't stop wearing his riding outfit.
When the inevitable happened and a car sideswiped him at 45mph, he was able to do a series of forward rolls and ended up walking away with only a few bruises and a mildly sprained ankle. The bike was totaled.
Their radness douching into my face doesn't offend me. It's the fact that everyone driving around them is scared shitless they are about to commit involuntary vehicular manslaughter when they fuck up.
It's amazing how it's always the guys who don't wear safety gear who are impulsive enough to pull this shit and traffic and become legends. Legends at tearful funerals and/or yearbooks.
Driving on SoCal freeways, I have seen shit significantly more insane than this (the guy surfing his bike -- standing on the seat and taking both hands off the handles -- comes to mind), but sadly none of them have ended so satisfyingly.