The WNYC announcer just started a story 'I was in the subway and I heard something that sounded like Amazing Grace played on the theramin...' and it turned out just to be someone playing on a saw. That's almost as much of a letdown as the infamous Jesus on a Spaceship.

n.b., buskers: playing the theramin or ondes martenot on the subway will result in a large denomination bill in your obscure-instrument-case