It's already illegal to ride after dark without lights. A $10 headlight could have saved this clown a lot of grief. And thanks to the poster who pointed out that he was riding on a pedestrian bridge- those kids who laughed at him probably thought his accident was a bit of poetic justice.
I can't figure out what the problem with either side of the bike/car war is. I've been biking to work for 20 years in city traffic, and not only have those years been accident-free, encounters with rude/aggressive/homicidal motorists have been extremely rare. Why? Simple. I stay in my lane, signal turns & lane changes, stay off sidewalks, and at night I'm lit up like a christmas tree. Most motorists only get nasty if you get the adrenaline going, which tends to happen if they think they nearly killed someone. Don't scare 'em and they leave you alone.