This is an outrageous overturn, shameful. Perhaps it was more shoulder than head but it was enough on the head for me. The defender lowered his head and showed a callous and wanton disregard for the safety of the opponent. Maybe not enough to call from the booth IF the on-field crew didn't throw a flag, though I'd certainly support it. But to say THIS is definitive enough to pick up a flag is simply outrageous.