There is a show my husband and I like to watch called Ninja Warrior. It is about the toughest obstacle course I have ever seen in my life. Actually, I know it to be fact that it's the hardest one I've ever laid eyes on. I am under no illusion that I could even come close to doing it. The competition takes place in Japan, but people from all over compete. They start out with 100 competitors in stage 1 and the most I've ever seen make it to stage 2 is around 10. Once they complete stage 2 they move on to stage 3, which is just pure insanity, hardly anyone makes it past stage 3. If someone does make stage three they then have to climb a pretty long rope in a short amount of time. I wish I could remember either of those specifics, but my memory is failing me and I can't find them anywhere. There have only been 3 people to complete all four stages in 27 competitions. I hope that gives you can idea of how crazy it is!
Lastly, life is kind of like one big obstacle course, so I'm glad I've been preparing my whole life! :)