EMPLOYEE STATES THAT HE WAS TRYING TO MOVE A LARG ROCK WITH DOZER; THE ROCK GAVE SUDDENLY, AND THE DOZER LURCHED INTO THE HOLE IT HAD CREATED. ORIGINALLY, HE COMPLAINED OF PAIN IN NECK & SHOU LDERS; ON 8/15/00, HE REPORTED THAT HE WOULD BE OFF WORK WITH TWO ""BULGED"" DISCS AND WAS TO SEE A SURGEON.