EE WAS WELDING ON A CONVEYOR AND AFTER A TIME HE USED A FORKLIFT TO MOVE THE CONVEYOR. WHEN HE RETURNED TO CONTINUE WELDING HE FORGOT HE HAD MOVED THE CONVEYOR. WHEN HE TURNED AROUND TO PUT ON HIS WELDING SHIELD HELMET, HE BUMPED HIS FOREHEAD AGAINST FORKTRUCK FORK, CAUSING HIM TO CLENCH HIS TEETH. THIS CAUSED A TOOTH TO BE DAMAGED.