 at all knows this is a big deal, climbing El Capitan, climbing the stuff that you climb. So this is very, very hardcore. And you do what's called free climbing. You want to talk about that? Yeah, so free climbing just means that you're using your hands and feet. You have gear for protection. And when I go out into the mountains, most of the time I'm using gear. So if I fall, I'm safe, I'll be okay. But on the skyscrapers, there's no...