It's a guy with some sorta hi-tech overhead projector on a huge screen doing everchanging art with sand, set to music. It looked like some kind of Adam and Eve story, with animals (there's a neat morphing effect between different animals) and a tree and a nude man and woman. Sort of a performance art version of Navajo sand painting. Pretty cool.
At the end of it I thought "This guy rolled an 18 Dex." How sad is that?