Says David Rosen:

So I'm a film score composer (and sometimes comedy-rapper... long story haha) and back when the Kickstarter for Anomalisa came out (I'm a backer, of course), I had contacted them to see if they might need help with any music. This was before it was announced that Carter Burwell would be handling the score. They said no but if I wanted to make a song that they could maybe give out as a thank you to the backers, they'd love to hear what I come up with.

So he did, and although the song wasn't used in the Kickstarter campaign, here's the result:

Only a minute and a half long, but it contains so many words that have never shared space in a single song. That's impressive.