A lot of drummer use verbal 'cues' while they're drumming. If you really pay attention, lots of drummers look like they're talking when they're playing.
It didn't look too bad and it actually looked fun. It adds the random element of chance to normal chess, so that a person having an advantage isn't as clear like regular chess, by there being a 50/50 chance of a piece occupying a specific space.
Edit: This video was amazing by itself but I actually came out of it wanting to play this version of chess.