David Colhoun and a friend climbed a seemingly vertical slope on the Dark Shadows wall west of Las Vegas. They were using ropes and pitons and had reached about 275 feet above the ground when a free climber -- someone who uses just feet and hands -- asked if he could pass by. He had things to do and the slow-moving Colhoun was getting in his way.
Watch the nerve-wracking ascent of this incredibly brave and skilled man.
-via Twisted Sifter