I hate to so shamelessly repost something I saw on Kottke for the second time in a few months, but this dance video is so intoxicating I can't resist. It uses motion capture of some mesmerizing dance performances, and mixes in the artistry of mapping those body movements on to some wild textures and physiologies. The result feels very organic and real, even in cases when the "dancer" couldn't possibly be a living three-dimensional being. Also, the soundtrack by Major Lazer is so infectious that it makes me want to drop whatever I'm doing, go out and run.
See also: one of my favorite videos, for Wide Open by Chemical Brothers, which also mixed motion capture with live performance.