EE WAS CUTTING BLOCK WALL WITH GAS POWERED DIAMOND WHEEL CUT-OFF SAW. EE WAS ON SECOND RUNG OF LADDER. HAVING FINISHED CUT, HE KEPT ONE HAND ON SAW, PUT OTHER HAND ON THE LADDER TO CLIMB DOWN. HE BUMPED THE LADDER WITH THE SAW & WHILE THE BLADE WAS STILL SPINNING THE BLADE HIT HIS LEFT KNEE CUTTING IT. THE CUT REQUIRED 21 STITCHES.