1 flute for 2 musicians, 1 phone, JS BACH air on G string.

http://www.youtube.com/watch?v=_sAXDXGbB2U&feature=related

 

Not only the 2 musicians are playing on the same flute, but they answer to the phone and continue to play with the quartet.

 

 

See also Jerusalem with  Chagal  

http://www.youtube.com/watch?v=3msEDrPW5ic