I actually thought Billy was gonna win. Even when David had him to T and Billy only had him to S, I thought that he was gonna somehow come back and bust out all of his double flip tricks first try and beat him in an instant. I'm glad David won though, that's who i was routing for.
EDIT: Also, if you notice right after David lands the switch varial flip, you can see Billy shaking his head, probably thinking "fuck, just miss and get a letter already". Pretty funny.