Ed is already wearing only a towel when he enters the locker room. Where did he take his clothes off?
When Mitch talks on the phone and J.D. tries to ask what's wrong, Mitch raises his hand to indicate he's still talking, with his fingers pointing up. It then cuts to a longer shot and his fingers are pointed to the side.
After J.D. says the models are the sexiest in the world, his mouth doesn't match the laugh he gives.