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Trials riding is one of several unicycle riding disciplines, mostly done by much younger riders, and it's easy to see why!
The rider must negotiate over obstacles without dismounting. The obstacles traversed can be set up specifically for the purpose of unicycle trials, but are often walls, railings, ledges and other "street furniture" found in an urban environment. The sport is derived from (or at least inspired by) bike trials and motorcycle trials.
So I went out to see what I could do, and everything you see in the video took multiple attempts to get each trick. Very challenging but fun, and a great feeling when you land a trick.
When I was in hospital in a bed opposite was a guy who had gone with his kids to ride in a local wood on a push trail type bike. He went into a pothole and fell over the handle bars. Result 3 cracked ribs and a punctured lung .
You seem a well balance chappie, but I nearly disqualified you for almost touching the table...011...but I let you off. Brilliant and thanks for sharing