The 1K project involved 1000 people racing a car solo over an insane track on some racing game, each saving a record of their race, then using software wizardry to superimpose the cars over each other. You get a very nifty-looking result. But the real artistry of this video is the camera-work that captures the chaos.

A more hi-rez version of the video is available here (select the full screen option).