Sudden Words, Suddenly Gone
by ROBERT KRULWICH, NPR
Shinichi Maruyama, who lives in New York, takes a glass of water (or sometimes a mop or a big calligraphic brush) and with a swirl of his hand or his wrist or by some voodoo which he probably can’t explain, he is able to turn sheets of liquid molecules into Japanese calligraphy. He calls them "Kusho" or "writing in the sky."
This, for example, is ink in midair...