This is a group of deaf Chinese dancers doing an incredible routine on a Japanese fund raiser for people with disabilities. All the crazy arm stuff is in honor of Senju Kannon, one of the most widely worshiped bodhisattva in Asia. According to legend, she (or he, depending on various accounts) vowed to never rest until every being was freed from samsara. Since that was such a pain, Buddha split her head into 11heads (to hear everybody complaining better). After hearing all those people suffering, the goddess tried to reach out to them all and her arms shattered. Buddha saw this and hooked her up with 1000 arms to help everyone with.
Cool dance, cool Buddhist legend.
Thanks to Japundit.