2ND DRIVE 25 WEST BELT, THAT IS BEING DISMANTLED, AN EMPLOYEE WAS DRIVING A PIN OUT OF A BOOM JACK. WHEN THE PIN CAME OUT THE BOOM FELL DOWNWARD CATCHING THE 6"" BOLT (USED TO DRIVE THE PIN) PU SHING IT UPWARD PINCHING HIS LEFT INDEX FINGER (TIP) AGAINST THE FRAME.