(Sarah of the Clue Crew watches a wire walker practice at Circus Center in San Francisco, CA.)  Moving the parasol in the air helps the wire walker keep the point known by this three-word term directly over the wire
[DOC] [TLE] The Man Who Walks on Air - The New Yorker [PAR] Apr 5, 1999 ... Calvin Tomkins spends time with Philippe Petit, the high-wire artist who walked 
between the twin towers of the World Trade Center, in New York.