THE EE WAS CLEANING UP UNDERNEATH THE CRUSHER WHEN HE REAGGRAVATED AN OLD SHOULDER INJURY. HE WAS USING A HAND TOOL TO REACH UNDERNEATH AND SCRAPE UP THE LOOSE BARITE SPILLAGE WHEN HE FELT HI S LEFT SHOULDER POP OUT OF PLACE. HE IMMEDIATELY POPPED IT BACK INTO PLACE. THE DOCTOR'S DIAGNOSIS WAS A ""CLOSED POSTERIOR DISLOCATION OF HUMERUS.""