Bonkers? Breath-taking? Utterly stupid? Or amazingly skilled? Whatever your thoughts on this daredevil stunt, we'll bet that you can't help holding your breath for the entire event. (Rather like being incapable of NOT licking your lips while eating a sugared doughnut!) 

This American thrill-seeker successfully walked across a 41m rope strung 1,800m across China's Enshi Grand Canyon - without any safety equipment. The top slack liner is 40-year-old Dean Potter, 40. He put his life in the hands of his own skill, balance, concentration - and luck - for a full three minutes. Take a look...