EE WAS OPERATING A 10 JOY S/C. WHILE BACKING UP THE S/C THE EE HAD HIS LEFT HAND ON THE OUTSIDE OF THE STEEL CANOPY. HIS LEFT HAND WAS CAUGHT BETWEEN THE STEEL CANOPY AND THE COAL RIB. THIS AC CIDENT RESULTED IN A BROKEN LITTLE FINGER AND A LACERATION TO THE INSIDE OF THE LEFT HAND.