EMPLOYEE WAS CLEANING CORDS AND A PIECE OF DOG CHAIN THAT WAS WRAPPED AROUND THE TAILROLLER SHAFT AT THE 4I TAILPIECE. THE BELT WAS TURNED OFF. WHILE ATTEMPTING TO REMOVE THE OBSTRUCTION, THE BELT UNEXPECTEDLY DRIFTED CAUSING HIS HAND TO BE CAUGHT. HIS REACTION WAS TO PULL HIS HAND OUT. THIS CAUSED THE LACERATION.