there were certainly some tense moments 15,000 feet over hellhole bend. that s daredevil nik wallenda making history on a hire wire walk near the grand canyon. if you re a wallenda, doing stuff like this is in your blood. miguel marquez takes us on a harrowing thrill ride. shoes feel slippery. there s dust on this cable. reporter: it didn t start well. just need to relax more. kind of hard to relax when you re 1,500 feet above the canyon. reporter: 22 minutes and 54 seconds of death defying were vertigo inducing, thrill. that s a view there, buddy. reporter: a two-inch thick cable stretches a quarter mile across the little colorado river. i m not liking it. reporter: the most hair raising part of the discovery channel feat. help this cable to calm down. reporter: when the seventh generation daredevil s balance pole began swinging. teetering higher and higher. winds are way worse than i expected.