So its physics then ???
I`m 95 k and couldn`t come up with a combo that I could have competed with. (I`d have ben overpowered on anything over 5, but perhaps I`m a wimp)
I think over 200 metres plus I`d have reeled him in but it was quite remarkable his speed over first 50 metres. (and his direction;ie well into wind and with a tiny fin !!)
Was impressive !
Made me want a freestyle board for B+F !