WHILE LOADING BELT STRUCTURE, FELT SHARP PAIN IN LOWER BACK. NOTE: INCIDENT HAPPENED ON THURSDAY EVEING, EE CAME OUT TO WORK ON FRIDAY AND INFORMED HIS SUPERVISOR BUT DIDN'T WANT TO GO TO THE DR. AT THAT TIME. HE SAID HE HAD HAD THE PROBLEM BEFORE AND IT USUALLY WENT AWAY IN A FEW DAYS. CALLED ON MONDAY 10/15 TOLD HIS SUPERVISOR THAT HE WAS GOING TO DR.