this video from 1938 in india shows a man balancing on a loose, bouncy rope, hence the name slack line. these days, the line mich walks is more taut, and he takes the sport to new heights. once the nylon rope is stretched and anchored, mich gets to work. he makes it look easy, but make no mistake, it's not. even members of mich's entourage, who all use a harness. >> mich keeps his fear of falling in check. >> fear is not good. if you don't know how to control fear, it's becoming way more dangerous. >> green lake, austria. mich traverses a distance world record, 525-foot, 12-minute walk