Modern dance

There's a couple of very cool things going on with this dance routine. First off, it's based on the principles of fluid dynamics—physical laws that predict the movement of liquids and gases.

Second, the dance you're watching was recorded live. That means all the nifty "70s Sesame Street"-style tracer effects on dancer Hope Goldman's body, and the visual elements tracked to her movements, weren't added in later. Instead, Goldman and visual artist/programmer Andrew Moffat used infrared lighting and a custom-modded, $40 webcam along with custom software running on the GPU.