American Ninja Warrior is the coolest show known to mankind. Seriously. It's awesome. These contestants have to complete these really hard obstacle courses that look very difficult. They have them in a couple different cities and if you complete the qualifying obstacle course, then you move on to city finals, then you move on to Mount Midoriyama Stage 1, then Mount Midoriyama Stage 2, Mount Midoriyama Stage 3, then the final course, Mount Midoriyama Stage 4. Each course gets harder and harder and each year, new obstacles are put into the courses that make it much more difficult. You should watch it. Seriously.