First of all: You might think you've seen something like this before. But let me assure you, you haven't seen anything like this before. Granted, if you're like me and you live online, you might have seen it this weekend ;)
This is a Japanese dance troupe called Wrecking Crew Orchestra. And they blew. my. mind. Not only are they amazing dancers in Tron suits, they really took advantage of the lighting to push their dance routine to amazing limits. The effect is breathtaking, especially when you think that half the time, the dancers are doing their moves in pitch black so that when the lights are activated, they are in the right position.
(Source: One Cool Thing A Day)