AFTER LOGOUT/TAGOUT THE GUARD WAS REMOVED TO GET TO ROLLER. A COMEALONG WAS USED TO HOLD THE BELT IN PLACE. WHEN USING AN IMPACT TO REMOVE A BOLT, THE BOLT SUDDENLY CAME LOOSE AND THE TENSION ON THE BELT CAUSED IT TO JUMP, SLAMMING THE EE'S HAND BETWEEN THE IMPACT AND THE BOTTOM OF THE FEEDER.