I was flicking through the channels on TV to find something on to watch and when I got to Channel 4 I was confronted with this video as part of their random acts which are video interventions somewhat like a flashmob but for telly.
I jumped straight to the computer to share it with everyone because of how impressive and cool it is. I think what is happening is that he is using the vegetables and fruit as an electrical output and they are hooked up to the synth he has essentially making them another key on the piano. Never the less this is still really fun and clever.
Check out the guys soundcloud and I hope you enjoyed it as much as I did.