You know that feeling you get when you start running down a hill, gravity takes over and suddenly you find yourself worrying about keeping up with your own legs? That's what it feels like to listen to Jónsi's "Animal Arithmetic." The front man of Nordic rock band Sigur Rós (Iceland's only non-Björk claim to musical fame) takes us on a manic romp through some of life's greatest delights: riding bikes, making out, brushing teeth, elephants, fireworks and the knowledge that "every day, everywhere, people are so alive." The song, as with so many other tracks from Jónsi's solo debut, Go, manages to feel uplifting without being corny. It's only a matter of time before someone adds it to an indie-film sound track.