well i would have thought the biggest momentum shift would have been Oregon stopping Auburn on the goal line on 4th down...however, after that, it was Auburn 9-0 in the next 3 minutes..
Even if Auburn falls behind in the 2nd half, they will find way to win. The QB is the difference. Reminds me a little of Vince Young and the Longhorns. Their leader was not going to let them lose.