I knew a feller who played guitar with an egg shaker in his strumming hand, blew into a set of a bunch of harmonicas built like a corncob on a neck brace, used one foot on a drum with cymbal & tambourine attached, and with the other foot, played a set of bass pedals he scrounged somewhere.    I've only seen a couple of those unusual harmonica things, which left folks scratching their heads & asking "whut th' heck wuzzat?"