USING A GENIE (EXTENSIBLE AERIAL MANLIFT) TWO MEN WERE ATTEMPTING TO CLEAN OUT A PIPE. THEY HAD CLEANED ABOUT 1 1/2' TO 2' WHEN ABOUT 13"" BY 20'OF FROZEN FINES AND ICE CAME OUT, STRIKING INJUR ED IN THE RIGHT ANKLE AND KNOCKING OTHER EE OUT OF THE BASKET, WHERE HE HUNG FROM HIS LANYARD.