Christ, I hope he's ok!
Fortunately I've never witnessed anything as severe as that but I have to say that it also scares the hell out of me too... even if you are really careful, someone else on the road might not be. Whenever I hear of things like this, I always think that that particular person didn't know it was going to be their last day alive, they probably had plans for tonight or in the future, on his way somewhere when it happened. I know its a sad subject, I always try to make up to people any silly petty arguments, not to bear grudges and always show as much affection to the people around me that i care about as you never know when its going to happen.
Anyway, thanks for reminding me how precious life is. XXX