BLASTER WAS PREPARING TO LAY OFF A SHOT ON A BENCH. AFTER EXAMINING THE BENCH FROM BELOW, HE WENT BACK ON THE BENCH AND BEGAN PLACING REFERENCE MARKERS ALONG THE CREST OF THE FACE IN ORDER TO LATER PROFILE THE FACE. A SECTION OF THE BENCH (APPROX 4' X 5') SLID AWAY WITH EE ON IT. HE LANDED FEET FIRST ON A MUCK PILE BELOW, FRACTURING HIS HEEL. HE CLIMBED DOWN, SUMMONED HELP, HOSPITA