EE WAS HELPING THE ELECTRICAL DEPT. PULL WIRES THRU A CONDUIT ALONG THE SIDE OF #4894 CONVEYOR BELT. THE WIRES HUNG UP THEN CAME LOOSE. AS THE WIRES CAME LOOSE EE STEPPED BACK TO MAINTAIN HIS BALANCE. EE S FOOT HIT A BELT SUPPORT BEAM ON THE GROUND CAUSING HIM TO FALL BACKWASRD. THE SUDDEN SLACK INT HE ROPE THAT WAS ATTACHED TO THE WIRES THAT WERE BEING PULLED THRU THE CONDUIT CAUS