EE WAS HELPING PUT THE BUMPER BACK ON THE CONTINUOUS MINER. HE STATED LATER THAT HE FELT PAIN IN HIS LEFT SHOULDER. THE INCIDENT CAUSED A STRAIN TO THE SHOULDER AND THE EE STARTED MISSING TIME ON DECEMBER 9. HE WILL BE INSTRUCTED TO ALWAYS USE PROPER LIFTING PROCEDURES. THIS INCIDENT HAS BEEN UNDER INVESTIGATION PENDING MEDICAL REPORTS.