EE WAS WORKING ON LEFT HAND DRILL MAST. STEEL WAS STUCK IN THE ROOF. EXTENSION WAS IN DRILL HEAD, ABOUT 12"" BETWEEN STEELS. EE REACHED UP TO PULL STEEL FROM ROOF, WHEN IT CAME LOOSE, IT PINCHED HIS LITTLE FINGER BETWEEN THE STEELS, CAUSING AN INJURY TO THE TIP OF FINGER.