For the same baffling reasons they do many other things, the Japanese have been competing in synchronised team precision walking since 1966. They call it Shuudan Koudou and, as you can imagine, they do it perfectly well and it looks perfectly crazy.
Go to 1:30 in the video above to start seeing the crazy action. Below you can see the winners of the November 14 competition celebrated at Japan's Nippon Sports Science University. The team trained for 1200km. I know that in the US there's marching bands doing pretty nice things, but it's nothing like this level of precision and complexity: