EE used a forklift to move pallet of motor parts (each < 30 lbs) to metal recycling. EE tossed each part in container. EE turned to walk back to forklift and felt sharp pain in back. Next day pain had worsened. Called Healthbridge and told to self-care with OTC pain medicine. On 5/23/16 EE still had pain, went to Dr. and placed on light duty and prescribed medicine.