The easiest way is to slap the disk into DVD Decrypter and try playing all the VOBs. You'll need a PC and that program i mentioned. The VOBs will be in the VIDEO_TS folder.
From the main menu choose Bonus, then choose Hyperlite, then Decks, then Next, then Next again, then at that last wakesurfing deck screen hit the down arrow and the icon should disappear. Then hit enter.
dude dont stress on it theres no more riding ,its as dissapointing as the rest of the video..its just them hanging out and partying a bit in the extra secret scene..no big deal ...