EES WERE USING A MAGNETIC DRILL THAT WAS POSITIONED ABOUT CHEST HIGH TO THE EE THAT GOT INJURED. THE DRILL BIT SEIZED & THE MAGNETIC DRILL BAR CAME LOOSE & TURNED ONE FULL REVOLUTION BEFORE CO MING TO A STOP. AS THE DRIL BAS SWUNG AROUND IT CAUGHT THE INJURED EE'S L. HAND BETWEEN THE DRILL BASE & THE CORNER OF THE PIECE THAT WAS BEING DRILLED. THIS RESULTED IN A CRUSH INJURY TO EE'