EE WAS USING A RAILROAD JACK TO RAISE THE OUTBY END OF TAILPIECE TO RESET A CRIB BLOCK UNDER THE LEG WHEN THE JACK SLIPPED OUT CAUSING HIM TO FALL ON RT HAND & ARM. EE HAS CONTINUED TO WORK U NTIL 12/11/03 WHEN HE HAD TO HAVE A TENDON IN HIS RT ELBOW REPAIRED.