A PIECE OF ROCK FELL FROM BETWEEN BOLTS AS HE WAS COMING OUT OF THE 8TH NORTH SEAS AND HIT HIM IN THE BACK OF THE HEAD AND NECK. CONTINUED WORKING. WENT TO DOCTOR 5/17. CHECKED, X-RAYED AND RE LEASED. CONTINUED HURTING. WENT BACK TO DOCTOR. HAS BEEN OFF SINCE 6/4/00.