Highlining is one of those amazing things I love to watch video of (this Highlining Across the Face of the Full Moon for example) but prolly will never bring myself to do.
From the video:
"Andy Lewis takes on the world's longest freestanding tower highline spanning across Moab's beautiful desert terrain to the infamous Raptor Tower. This 80 meter long line (262 feet) was rigged and walked for the first time this past winter during very cold and frigid conditions. After a week of hard work and perseverance on the line, Andy was able to successfully walk its entire length several times without falling in both directions."