Slacking at 3000ft

I posted a video of Adam Colton and his friends slacking and then found another one worth posting. First I want to clear what exactly slacking is. Found this: Slack is a loose part, as of a rope or sail. And slacking is then walking on this loose part, trying to keep your balance for training or for making people go OMFG. The OMFG slacking was done by Leo Houlding. He walked across a slackline at 3000 feet to shoot a Berghaus Big Wall clothing range commercial.

Who is Leo Houlding? He is a British rock climbing prodigy born in 1980. Houlding began rock climbing at the age of 10 and in 1996, he became the British Junior Indoor Climbing Champion. Some of his climbs include the Angel of the North along and some of El Capitans toughest lines.