Even though Hopkins didn't mess his shoulder by throwing a punch (Antwon Echols) fight 2 basically body slammed him. It seemed at first his shoulder was dislocated (me thinks he was kinda faking/acting)

For the next round and half Hopkins took Echols to school with one arm.

Then like a movie star karate expert...he jerked his arm...like he had the power to snap it back in place. Funny shit.