If you are not familiar with bowed piano or prepared piano techniques, you have got to watch this video. In fact, you have got to watch it even if you are familiar with these crazy techniques :) I think it is so fascinating to hear all of the sounds that the piano can produce if it is just played a little....differently than normal. ;)
This is Dr. Scott Holden (my college piano professor) performing Entrada, a bowed piano piece by Stephen Scott, with a 10-student ensemble. It is well worth the 7 and a half minutes viewing time, and if you are like me you will be completely mesmerized by this cool piece. You can read more about this neat performance here.