Nik Wallenda

It seemed impossible ... but Nik and Lijana did it -- they walked a quarter of a mile across Times Square, 25 stories up and balancing the entire way on a tightrope.

In his latest death-defying stunt, Nik Wallenda will traverse Longboat Key's power lines to celebrate the March referendum.

That may be what “normal” people are told when they need to overcome vertigo looking out from a skyscraper’s top floor or other lofty position. But for high-wire daredevil Nik Wallenda — he of the famous Wallenda family of aerialists — looking down is part of the fun.

The special, dubbed “Skyscraper Live With Nik Wallenda,” will be hosted by NBC News' Willie Geist and Natalie Morales, as well as The Weather Channel's Jim ...