EE WAS HELPING INSTALL BELT IN #1 BELT LINE. A DIESEL MOTOR WAS BEING USED TO PULL THE LOOPED BELT OFF A FLAT CAR. THE BELT SLIPPED OFF THE FLAT CAR, STRUCK EE, SPUN EE AROUND AND INTO THE BELT STRUCTURE CAUSING INJURY. EE WAS POSITIONED BEHIND THE FLAT CAR AT THE TIME OF THE INCIDENT