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This is a human-powered merry-go-round that can accommodate
one to six people at a time. It uses the same principle that a spinning ice skater uses to accumulate energy from its riders to go faster/higher.
People love it. It was in continuous use at Burning Man 2008.
Video URL: http://youtube.com/user/lhzlhz
David Talkin
Engineer; employed at Google; I enjoy inventing and making; have an off-the-grid solar-powered house in the boonies; love the outdoors; presently studying and working on smart-grid issues; much of my career was in speech technology (text-to-speech); love to reveal phenomena