Alex Honnold, whom I’ve featured on this site before, is probably the best rock climber on Earth, and here’s a slo-mo video showing part of his recent free solo climb of a huge wall in Mexico. The YouTube notes say this:
On January 15th, 2014, Alex Honnold made the first free solo ascent of El Sendero Luminoso (5.12d), a 15 pitch big wall near Monterrey, Mexico. This is footage from pitch 7 (5.12a), filmed by Cedar Wright, Renan Ozturk, and SkySight RC for Camp 4 Collective. The full film is coming soon to The North Face’s YouTube Channel.
Honnold did the 1750-foot (533 m) climb in three hours.
I simply can’t imagine doing this without safety equipment. You have to have immense confidence in your ability to overcome any obstacle on that wall, and if you screw up, you’re dead.