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Powerbocking is a sport involving the use of spring-loaded stilt-like devices, which allow practitioners to run, jump, and perform acrobatic feats with superhuman ability. Known generically as jumping stilts and by hobbyists as bocks, after German inventor Alexander Böck, the stilts allow users to jump up to 5 ft (1.5 m) high and cover up to 9 ft (2.7 m) in a single stride. The closing ceremony of the 2008 Olympic Games in Beijing featured powerbockers. How fast can one run while wearing bocks? Discuss
Source: The Free Dictionary