Oh, he rolled on #9 too. And #3, and possibly on #4 as well(came close a few times, can't remember if he went over or not).
He hit the wall on #8 far enough to the right to miss the cone on the left everybody else was taking, and launched off the steeper part of the wall. If the valves hadn't been floating he probably could have avoided the roll(but who'd want to see that? )