I like the big grin on Leipheimer's face when the rider with the camera comes alongside him at the end!
The fact that they know there isn't much traffic on that road is probably why they feel safe to descend that way, but there were some vehicles at the side of the road halfway down. Risky!
I'm a fine one to talk - I once did a fast descent on a twisty turny road through some local woods and almost ended up with my head up a horse's bum after a blind bend!