That. Was. BRILLIANT. Even if the execution hadn't been well done (And it was)the concept alone it pretty fantastic.
Hah, that was pretty cool. Timing and positioning was just a tiiiiny bit off in a couple parts, but still very impressive.

It's the very fight you've dreamed of in all of your favorite action cartoons and CG movies, only, it's in live-action this time, performed by artist Taichi Saotome with the aid of a carefully coordinated "shadowgraph".
It's like when you cup your hands together in front of a lamp and make the silhouette of a dog's head barking...except way more awesome.