He hit an oil slick, and his Jetta decided it liked the look of the guard rail in front of it. He is now having to pay $6,000 out of pocket to fix it, since he is on his parents insurance, and they don't want to use the insurance for it, since his mom was rear-ended in this same car 3 months ago.
Moral of story? pay attention to the road, and be safe!
(^not my friend's jetta, I just love GLI's)