http://www.youtube.com/watch?v=qG74eVb6V10
Also very fun to watch Jason Becker playing live when he's about 17 or 18. It gets better at :30 when he stops yoyo-ing while he's playing.
http://www.youtube.com/watch?v=9WqE_q3kFUM
He developed Lou Gehrig's disease shortly after this, while recording with David Lee Roth. Still making music even though completely physically disabled now. Makes me cry to think about.