EE WAS USING A COME-ALONG TO PUT A CANOPY ONTO A SHUTTLE CAR. AS HE PULLED ON THE HANDLE FOR THE COME-ALONG HE FELT PAIN IN THE BACK OF HIS LEFT KNEE. THERE WAS NO DAMAGE OR IMPAIRMENT TO THE OPERATION OR TO ANY EQUIPMENT. IMPROPER BODY POSITION CAUSED THE INJURY. NO OTHER FACTORS INVOLVED.