Well..........Nik Wallenda scores pretty high in my book of greatest athletic achievements...over the Grand Canyon. 14oo foot walk over 1500' high. And, only with his feet! No hands!
This guy did a climb hundreds have done but his risk factor was through the roof.
Who here can focus for 4 hours on anything... let alone a sneeze or slipped grip means, well you know.
This is truly amazing.
Honestly, this shouldn't even be a debate... with room to spare no less.