Modern mechanical music?  A car music box?  Dozens of pianos played
while sitting on their side?  Hundreds of guitars, numerous percussion
pieces, all driven by a moving car?  Check out the new video at
http://www.youtube.com/watch?v=MejbOFk7H6c  From the YouTube page:

  The new music video from OK Go, made in partnership with Chevrolet.
  OK Go set up over 1000 instruments over two miles of desert outside
  Los Angeles.  A Chevy Sonic was outfitted with retractable pneumatic
  arms designed to play the instruments, and the band recorded this
  version of Needing/Getting, singing as they played the instrument
  array with the car. ...

Gary Rasmussen