>> this is 24-year-old meche sameda from stant mary in austria. he travels the world to places like california's yosemite national park. >> i'm going to do it. >> meche 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! >> meche is considered one of the best high-line slack liners, both with and without a safety harness. >> the feeling is amazing because you control yourself. and if you lose focus, it's getting dangerous. >> slack lining has been around for decades. this video from 1938 in india shows a man balancing on a loose