ACCIDENT OCCURRED AS EMPLOYEE WAS LEAVING THE WORK SITE AFTER HIS SHIFT CARRYING HIS LUNCH BOX/ICE CHEST. HE LOST HIS GRIP AND ATTEMPTED TO SET IT DOWN ON A CONVEYOR UNDERCARRIAGE TO HIS LEFT, HE NOTICED A PAIN IN HIS BACK AS HE TURNED LEFT TO SET THE ICE CHEST DOWN. HE IS RECEIVING A PHYSICAL THERAPY AND CONTINUING TO WORK. HE IS NOT DOING ANY LIFTING. THERAPY FOR 2-3 WEEKS.