Believe it or not there are people who do stunts on unicycles. Here is a video of some unicycle stunts. They mainly just hop around on them but one guy at the end jumps over a dude who is laying on the ground!
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The Torofluxus was invented in the early 1990s by Jochen Valett, then a 70 year old artist and craftsman near Hamburg, Germany. A thirty foot long ribbon of fine 'flat spring steel' is woven into a torus and the ends spot welded. When attached to a plastic core, it flows downwards gripping onto the core and shimmering like a silver bubble.
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