EE WAS OPERATING A FRONT ENDLOADER AND PUSHING UP THE ROCK STOKPILE AFTER TRUCKS HAD DUMPED THEIR LOADS WHEN A ROCK ROLLED DOWN BEHIND A TIRE OF THE ENDLOADER. WHEN THE MACHINE BACKED OVER THE ROCK, IT CAUSED THE EE TO BE BOUNCED AROUND AND JARRED HIS NECK. PHYSICIAN ADMINISTERED OSTEOPATHIC MANIPULATIVE TREATMENTS.