EMPLOYEE FELT BURNING SENSATION IN RIGHT SHOULDER WHILE USING PIPE WRENCH TO REMOVE A PIPE EXTRACTOR THAT WAS STUCK IN A 1"" PIECE OF PIPE. HE WAS HOLDING THE PIPE IN A VISE AT THE TIME. HE AGGRAVATED THE SHOULDER AGAIN ON 8-16 WHILE MOVING A WINCH ON A DOLLY. HE BEGAN LOSING TIME ON 8-13-03. MRI WAS NEGATIVE. INJURY DIAGNOSED AS RIGHT SHOULDER STRAIN.