Beethoven's 9th. On Theremins. Lots of Them.
Check out the awesomeness from the Jiyugakuen Myonichikan auditorium in Tokyo. And, in case you are wondering why the Matryoshkas, there is a reason for that too. The instrument they are playing is technically a Matryomin - a single oscillator Theremin. Matryomin = Matryoshka + Theremin . Get it? So yeah, its moved on from the domain of 50's scifi (which I love, FWIW) (The below is a screen-grab BTW. Video up top...)