THE WASHPLANT OPERATOR WAS LOADING SCREENS ONTO THE MAN-LIFT. WHILE DOING SO ONE OF THE SCREENS STARTED TO FALL OFF. THE WASH-PLANT OPERATOR TRIED TO STOP THE SCREEN FROM FALLING. HE GRABBED T HE SCREEN, AND THE SCREEN JERKED AND TWISTED HIS BACK. THE OPERATOR SUSTAINED A SPRAIN TO HIS LOWER BACK.