EMPLOYEE WAS LAYING ON A CATWALK ON C213 REACHING THROUGH FRAMEWORK TRYING TO GET THE RETURN ROLLER OUT OF THE BRACKETS. HIS BACK POPPED AND ALSO INJURED MUSCLE UNDER SHOULDER BLADE. HE DIDN'T GET BETTER SO HE WENT TO DOCTOR ON 3-12-01. HE WAS TREATED BY A CHIROPRACTOR AND ALSO GOT A PRESCRIPTION FOR THE PAIN.