THE EMPLOYEE WAS BARRING DOWN A DROP RAISE WHILE STANDING ON A MUCK PILE. HE BARRED DOWN A ROCK AND WAS UNABLE TO PULL THE BAR OUT OF THE WAY AS THE ROCK CAME DOWN ON THE FRONT END OF THE SCA LING BAR. THE EMPLOYEE'S RIGHT HAND WAS PINCHED BETWEEN THE BACKEND OF THE BAR AND THE BROW OF THE DROP RAISE.