Not sure I can work out where to even start with a move like this...
Meh! It was a fluke, the guy lost control about to come off but by complete chance catches hold of the boom again due to a freak wind shift, manages to stay on, not look to shocked and sail away ..... Could have happened to anyone of us !
i think that was a ricardo special from a few years back?
where is ricardo these days?
To my untrained eye, it looks like every other jump-spin-flick-slog move...
Not that it's unimpressive though 
Certainly looks like it could not be done hanging from the monkey bars in a playground.... must be windsurfing
