Daredevils - The Sky Walker

Dean Potter is a unique breed of daredevil. He is the only person in the world practicing extreme high-lining - a hair-raising variation of tightrope walking - which sees him crossing a bouncy stretch of 1-inch wide rope suspended hundreds of feet above some of the worlds most breathtaking canyons... without any safety harness. One slip and he could plunge to his death. Watch Dean's extraordinary attempt to survive the longest high-line ever walked and cement his reputation as one of the great pioneers of extreme sports. Credits: Channel 4 Mark Soldinger Dean Potter and everyone on the credit roll at the end.