EE STATED WAS HELPING TO REPLACE THE SCREENS IN THE SCALPER. HE HAD BEEN USING AN IMPACT WRENCH TO REPLACE THE NUTS. HE BROKE FOR LUNCH AND FELT SOME SPASMS INHIS MID TO LOWER BACK. HE WAS TAK EN TO THE HOSPITAL WHERE HE WAS X-RAYED SHOWING NO DAMAGE TO THE SPINE. HE WAS OFFERED MODIFIED DUTIES BUT DID NOT RETURN TO WORK THE NEXT DAY.