Dean Potter, a 40 year old world-renowned climber/BASE jumper and of course an American daredevil, is the first person to walk across China's Enshi Grand Canyon. As you can see in the video, he was barefoot and had no safety measures to protect him. The gap was about 130 feet and the height was approximately 6,000 feet high. He only had his headphones on to keep him focused. It took him about 2 minutes to accomplish this nerve-wracking feat.