AS HE WAS REMOVING THE LEFT HOIST CYLINDER FROM THE FRONT-END LOADER, HE HAD THE BUCKET UP SITTING ON TOP OF A HOPPER. HE STARTED TO REMOVE OIL LINE UNDERNEATH THE MACHING WHEN SUDDENLY THE BU CKET FELL. THE LOADER ROLLED BACK AND AS HE TRIED TO GET OUT FROM UNDERNEATH HE TRIED TO GET OUT FROM UNDERNEATH HE TWISTED HIS ARM AND HURT HIS LEFT HAND.