EE WAS OPERATING THE CAT 775 HAUL TRUCK AND WAS BEING LOADED BY A MICH. L480. UNKNOWN TO THE LOADER OPERATOR, A LARGE BOULDER WAS BURIED IN THE BUCKET, WHEN THE LOADER OPERATOR DUMPED HIS LOAD THE BOULDER FELL OUT ROCKING THE HAUL TRUCK. THIS WAS THE FIRST LOAD DUMPED INTO THE TRUCK, CAUSING THE IMPACT OF THE BOULDER TO BE GREATER. EE WAS SEEN BY A PHYSICIAN. AND GIVEN TWO PRESCRIP