Those stalled forwards are beautiful to watch. I see Koster only moves his hand back down the boom a split second before he initiates the forward. Almost looks like he could plane straight out of those doubles as he gets the full rotation.
Out of interest how big is Koster too - for a wave sailor he'd be an exception rather than the rule????
It's pretty envy-inducing to see that the is also so sure at landing is moves on a starboard tack. Sure, on his port tack he is able to land double fronties and continue planing but I would be content to be able to do a double frontie once, on any tack :P
And yeah, he is indeed pretty big for a wave sailor. His build is more characteristic of slalom sailors.