That was an unbelievable finish. Fans rush the field after an incomplete pass. Officials review it and put 1 second back on the clock for BYU. BYU's 51 yard field goal is blocked, but fans rush field prematurely so they get a 15 yard penalty and another chance for BYU and then the 36 yarder hits the upright.
If he had made that kick and BYU won in OT, the fans would have started burning **** and throwing it on the field I bet.