HE WAS HAVING TROUBLE WITH THE SUCTION ON THE DRILL HEAD. HE PLACED HIS LEFT HAND ON THE DRILL CHUCK TO FEEL FOR SUCTION. HE ATTEMPTED TO SWING THE HEAD OVER TO WORK ON IT AND INADVERTENTLY HI T THE LIFT LEVER INSTEAD OF THE SWING LEVER. HISFINGER WAS PINCHED BETWEEN THE CHUCK AND DRILL STEEL.