THE EE WAS ASSISTING IN THE WEST OF A CHUTE FOR THE FEED ON THE MAGNETIC SEPARATOR. WHEN THE CHUTE WAS BEING MANUEVERED INTO POSITION BY USING AN ELECTRIC CHAIN HOIST. THE STOP FOULED ON THE CHUTE CAUSING THE CHUTE TO SHIFT WHILE TRYING TOCONTROL THE CHUTE HE TWISTED HIS BACK RESULTING IN A SHARP PAIN