EMPLOYEE WAS ASSISTING IN POSITIONING A DECK WINCH. USING PRYBARS, TWO MEN WERE MOVING THE WINCH INTO POSITION WHEN ONE BAR SLIPPED. THE LOAD (APPROXIMATELY 250 POUNDS) WAS TRANSFERRED TO THE OTHER BAR. THE TRANSFER OF WEIGHT PINNED THE INJURED EMPLOYEE'S FINGER BETWEEN THE PRY BAR AND AN ELECTRIC MOTOR.