EE WAS REMOVING A LARGE IMPACT FROM THE MONORAIL. HE WAS PULLING IT TO THE AREA THAT IS ESTABLISHED INT HE MONRAIL TO REMOVE IT. IN DOING SO IT CAUGHT ON SOMETHING ON THE RAIL. THEY EE BACKED IT UP AND PUSHED IT FORWARD AGAIN AND IT ROLLED OFF THE END OF THE RAIL STRIKING HIM IN THE THIGH. WAS TAKEN OFF OF WORK BY A PHYSICIAN.