Invisible Scary Things
Here's how Matt describes it:
"Basically they ask poets to write a poem on a topic they've just been given, and they have only 15 minutes to do it. Their software records the keystrokes and so when you see it, you see the poem being written keystroke by keystroke."
It's lots of fun. And there's a button (I didn't find it until halfway through my viewing) you can use to speed up the show 4x.