Last night at the Sufi World Spirit music festival in Jodhpur, I saw Johnny Greenwood play backing guitar for a huge band led by Shye Ben Tzur. Shye is Israeli but lives in India. There were four drummers (all with different Indian drums), a whole brass band and a lead trumpeteer, and a couple singers sitting in front of Harmonium. I didn't know what to expect, but it was pretty amazing. The music was fun. Johnny of course acted exactly as he does at a Radiohead show and mostly played with dials the whole time. At the end the Maharaj, ruling prince, came out and it was pretty hilarious to see Johnny do the whole Namaste thing.
Anyways, the music is pretty good. I think there may be a record coming out of this collaboration?
Here is Johnny himself talking about it: http://www.standard.co.uk/goingout/music/radioheads-jonny-greenwood-on-performing-with-shye-bentzur-at-the-alchemy-festival-9382301.html
and a live clip