EE WAS OPERATING A JOY 14CM15 MINER WHEN A LARGE ROCK )APPROX. SIZE 4 1/2' X 3' X 2-4"" THICK) FELL OUT FROM BETWEEN THE BOLTS NAD STRUCK THE EE IN THE HEAD. THE ROCK THEN LANDED ON BOTH WRISTS AND PINNED THE EE TO THE GROUND, CAUSING HIM TO BRUISE HIS BACK ON THE ROCK THAT HE LANDED ON.