WAS PLACING A VIBRATOR ON A GYP RAILCAR HOPPER & MISSED THE BRACKET. HELT ONTO THE VIBRATOR & FELT PAIN IN HIS BACK. WENT TO THE DR. ON 6/20/03 & WAS DIAGNOSED WITH A SRAIN/SPRAIN ON HIS BACK. HE WAS GIVEN RX FOR PAIN & MUSCLE RELAXER, BUT RETURNED TO WORK ON LIGHT DUTY. ON 6/24/03 HE RETURNED TO DR. WITH CONTINUOUS PAIN & WAS TOLD NOT TO WORK UNTIL NEXT VISIT.