He swears it's not as hard as it looks - we just don't believe him: Meet the world's most extreme unicyclist

It looks like a circus act - but this extreme sportsman has taken unicycling to the next level. Mono-wheeled adventurer Kris Holm has spent the last 23 years travelling the world - from the Great Wall of China to the wilds of California - honing his skills. Now the 36-year-old from Vancouver is gearing up for his latest challenge - taking on two-wheeled riders in a mammoth competitive race