Combat Nunchucks

This competition is unlike any other competition. (Well, maybe it is.) It's a nunchuck competition, and they're blindfolded. At first, they use bells to sense the opponent when they practice, but during the real competition, they take the bells off. I think it's cool, although I do not understand why anybody would take a nunchuck class, or why there would even be a nunchuck class.

My only real question is, how many people actually compete?