EE WAS REPAIRING A BROKEN TRACK PAD ON A FEEDER/BREAKER. THE FEEDER FRAME WAS BLOCKED UP WITH CRIBS. THE TRACK ASSEMBLY WAS NOT BLOCKED SO AS TO GAIN ACCESS TO THE BROKEN TRACK PAD. AS THE EE WAS INSERTING THE PIN IN THE TRACK PADS, THE TRACK ASSEMBLY DROPPED SMASHING HIS MIDDLE FINGER ON RIGHT HAND BETWEEN A CRIB AND TRACK ASSEMBLY.