This is one of those things where words pretty much fail the modern blogger. You watch it, you scroll back to the beginning, you think things like "How?", "How many divers are really there?", "CGI?", and finally, "Freakin' cool."
Also, note how the post title makes it sound like I already knew exactly everything about Denki Groove? Not the case at all. Wikipedia tells me their a Japanese electropop group, influenced by Kraftwerk. But you knew that.
(via Boing Boing.)