A group of thrill-seeking adrenalin junkies have launched Britain's first club for extreme unicycling.
Riders fight to maintain their balance as they plummet down sheer rock faces on their one-wheeled machines.
"Mountain unicycling is described as a cross between mountain biking and rodeo riding, and that's absolutely spot on," said Kevin Callaby.
Mr Callaby, 34, of Falmouth, Cornwall, and fellow extreme sports enthusiats have formed MUCK - the Mountain Unicycling Club Kernow.
Extreme mountain unicycling was pioneered in the States in the 1990s and has spread to Europe in recent years. This amazing video was shot in Italy.
http://www.youtube.com/watch?feature=player_embedded&v=RKdX32g5Lz0
Enthusiasts pedal, pivot and bunny hop from rock to rock as they race down treacherous coastal paths on their custom-made, one-wheeled cycles.
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