HE WAS IN A GRADER BACKING UP AND HIT A ROCK AND HE SAID HIS HEAD HAD HIT THE GLASS BUT HE KEPT WORKING. THEN AT 10:30 AM HE WAS GRADING THE ROAD & HIT ANOTHER ROCK JOLTING HIS NECK. HE LEFT T HE JOB & WENT HOME. HE CALLED THE OFFICE ON NOV 20 AND SAID HE WAS OK. THEN ON NOV 21 HE CALLED THE OFFICE & WENT TO FAMILY DOCTOR.