Mars Volta had a Dream Machine

Back when I was learning 3D animation in about 1994, I found a description of a "dream machine", a device that comprised a cylinder with holes cut in a pattern, placed on a turntable, with a lightbulb hanging in it. You were supposed to stare at it until you started dreaming. So I used Strata and Quicktime and made one. I never saw one until I went to a Mars Volta concert this summer, and they fired up a genuine dream machine.