(B) UNDERGROUND LOCATION: SECTION BELT TAIL. EE WAS ATTEMPTING TO REMOVE A CRIB TIE FROM UNDER THE FEEDER AS IT WAS BEING TRAMMED BACK ONTO THE TAIL PIECE. WHEN THE EE PLACED HIS HANDS ON THE CRIB TIE THE FEEDER TILTED BACK ONTO THE CRIBS. THE EE'S 3RD & 4TH FINGERS R. HAND WERE CAUGHT BETWEEN CRIB TIE AND MINE FLOOR - TIPS SEVERED. EE DID NOT HEAR THE ALL CLEAR SIGN.