![I've been seeing guys ride around standing on a single wheeled thing, much like in the old B.C. comics (link to image below.) What are these things called? Are they difficult to I've been seeing guys ride around standing on a single wheeled thing, much like in the old B.C. comics (link to image below.) What are these things called? Are they difficult to](http://i.imgur.com/J6oCjcA.jpg)
I've been seeing guys ride around standing on a single wheeled thing, much like in the old B.C. comics (link to image below.) What are these things called? Are they difficult to
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The Best of B.C.: 58 Years of Pithy Prehistoric Puns and Fun: Hart, Johnny: 9781785853531: Amazon.com: Books
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