Slacklining 4,000 Feet Above The Earth - "Sketchy" Andy Lewis

Slacklining - the act of walking along a loose nylon mesh - is a sport that was pioneered by rock climbers to kill down time when they were unable to be hanging from wall faces. But in the past few years, it has become a sport pursuing its own identity, with daredevil athletes pushing the boundaries of what is possible. One such athlete is "Sketchy" Andy Lewis who recently completed a famous feat of one-upmanship when he slacklined 4,000 feet above the Earth between two hot air balloons, without any leash attaching him to the line. Lewis explains how he and slacklining grew up together, and what he sees in the future for himself and the sport.