You’ve heard of extreme sports before, but t... ...disciplines involving extreme bicycling, extreme unicycling comes in a variety of forms. Street unicycling involves tricks like those skateboarders perform,... ...incorporating ledges, handrails and stairs. Trial unicycling...
https://www.neatorama.com/2012/10/10/7-Extreme-Versions-of-Normal-Activities/
7 Extreme Versions of Normal Activities...
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