WHILE MAKING WEEKLY AIR COURSE RUN, A ROCK FELL FROM BETWEEN STRAPS AT 11 1/2 WALL GLANCING OFF HIS HARD HAT KNOCKING HIM TO THE GROUND. HE EXPERIENCED BURNING IN THE BACK OF HIS NECK & RIGHT KNEE & SOME SWELLING IN HIS NECK. HE TRIED TO WALK IT OFF. BURNING WOULD NOT STOP. INDIVIDUAL BEGAN MISSING 7/7/03.