It wasn't nearly as bad of a call as the Duke people want to believe. He was clearly over the back, and while it's rarely called, it was still a legitimate call that could be made. Never mind the fact that on Flagg's potential go ahead bucket, he CLEARLY chicken winged/hooked the defender, which should have been called an offensive foul. Duke blew a 15 point lead, a multiple possession lead with under a minute remaining. They deserved EXACTLY what they got.