It's a strange feeling, when you hear a good piece of music. It starts out kind of shaky, this hot, heavy knot in your chest. At first it's tiny, like a spot of light in a dark room, but then it builds, pouring through you. And the next thing you know, everything from your forehead down to your fingers and toes is on fire. You feel like the hot, heavy knot in your chest is turning into a bubble. It's full of everything good in the world, and if you don't do something--if you don't run or dance or shout to everyone in the world about this music you've just heard--it'll explode.