The turning point in the North Carolina-Notre Dame matchup Saturday was a 3rd-and-18 for Carolina. The Heels completed a long pass over the middle, but on the play Notre Dame's Robert Blanton stripped the ball and recovered for a Notre Dame turnover. The call on the field was Notre Dame ball, but it was overruled.
Two referees made two completely different calls on the same play, which would seem to call for a mandatory review. That didn't happen. North Carolina went on to score a touchdown that turned the game.
Notre Dame clearly should have had the ball at midfield. As you can see below, the ball is loose before he goes down.