That looks like pretty advanced windsurfing technique to me...
Basic moves, but expertly executed.
Yeah we know he's good and can do most maneuvers , but can he do a no-hander gybe? (Didn't see one here). 
Most probably! 
PS: Met him in the early 90's and got his autograph when he came out to our local sailboard shop "Bai Snow n Sail" in Five Dock. Nice guy.
