Dancing Tokyo cosplayer flashmob broken up by cops

These Japanese cosplayers (anime costume hobbyists) gathered for a flashmobby synchronized dance-routine in the middle of Akihabara, Tokyo's nerd-mecca. Dozens of them did a stupendous dance routine in the middle of the street, but scattered when the cops showed. The video is wild. Link

Update: Brian sez, "The cosplayers are actually doing the dance from the ending of the anime 'The Melancholy of Suzumiya Haruhi,' previously discussed on Boing Boing."