EE WAS OPERATING A 992G CAT LOADER WHEN FRONT TIRE DROPPED IN HOLE CAUSING MACHINE TO SHIFT. EE COMPLAINED OF NECK PAIN TOOK HIM TO HOSPITAL. X-RAYS NEGATIVE. EE WENT ON VACATION AND R.T.W. HIS NEXT SCHEDULED SHIFT. HE CONTINUED TO WORK UNTIL 6-28-02, WHEN HE INFORMED HIS SUPERVISOR HIS DR. HAD TAKEN HIM OFF WORK.