It's Cymbal Rush ! The last track of Thom Yorke's solo album The Eraser.
What I really love about Cymbal Rush is that if I really listen to it, lying down with earbuds, I feel rejuvenated and ready to go when it's over.
It's like it takes me through a succesful nap in its five minutes run. I'm first hypnotized by the steady rhythm and the dreamy electronic music then Thom's singing walks you through a kind of little nightmare and the music livens until it reaches a kind of climax and then stops and you're left with the rhythm and ready to move on.
