Liz Carmouche suffered bite marks on her arm from the teeth of Ronda Rousey during a rear-naked choke in the main event of the UFC 157 (watch highlights here). Rousey’s mouth guard fell out during the submission attempt, causing her jaw to clamp down on the forearm of her opponent. Rousey said after the fight --which she won by armbar-- that the biting was unintentional, and at the post-fight press conference Carmouche seemed to have no hard feelings. While the clamp of Rousey’s jaw likely didn’t effect the outcome of the fight, the imprint of a fighter’s teeth on their opponents arms is certainly a UFC first. -- Photo via Ant Evans