New York City Subway As a Musical Instrument?

While everyone is waiting for the release of real-time data for the nation's largest subway system, one engineer decided to build an amusing application. MTA.me takes schedule information for New York's many subway lines and spawns trains on the screen as they leave their starting points, showing them as growing lines. Whenever lines intersect, the one being 'hit' acts like a string in that it bends and is released, generating a musical tone. So after a few minutes you are hearing an oddly Asian string concert. This is all in Flash, and not apparently accessible in any manner, but there's no real user interface anyway. There's an interesting page on it by the developer, Alexander Chen.