>> you just have to find your own ways through it from point a to point b. >> this is 24-year-old mich kemeter from st. mary, austria. he travels the world to places like california's yosemite national park. >> i'm going to do it! >> mich is one of two people ever to concur taft point without a safety harness, a 99-foot walk on a one-inch-thick nylon rope, a vertigo-inducing 6,900 feet over yosemite valley. remember, this is without any safety gear. >> whoo-hoo! >> mich is considered one of the world's best high-line slackliners, both with and without a safety harness. >> the feeling is amazing because you control yourself. and if you lose focus, it's getting dangerous. >> slacklining has been around for decades.