 So on the hour, every hour, you run 4.167 miles. As long as you're back in that stark corral within the hour slot, you go again. It's up to you how fast or how slow you do it. But as long as you're ready for the next loop and the next loop and the next loop, then it's as simple as that. I think it's just human nature. We want to see what we're made of. I think we want to see what we're capable of. We want to see how far we can push our bodies physically, mentally. We want to see if we can actually take it to the next level. And I think we're always curious as human beings to see if we can.