EE WAS ASSISTING TWO CO-WORKERS IN LIFTING A BATTERY CHARGER ONTO A BATTERY POWERED SERVICE WHEN A PIECE OF DRAW ROCK, MEASURING 3 FT X 5 FT X 1 1/4 IN, FELL AND STRUCK HIM ON THE OUTSIDE OF T HE RIGHT FOOT (BEHIND METATERSAL GUARD). SEAM HEIGHT WAS APPROXIMATELY 78 INCHES.