Olivia Munn recounts her experience with Kevin Pereira at Sasuke 21 in Tokyo, the first time they ran the 'Ninja Warrior' course.

At Camp Pendleton, Ninja Warrior veteran, Paul Terek talks about what it takes to be a true Ninja Warrior.

A look at the five men who appear season after seaon on 'Ninja Warrior,' and who are, without question, its All-Stars.

Here's a look at one of the American Ninja competitors, a stuntwoman and free runner named Luci Romberg.

We take a look at the most universally difficult obstacles on the Ninja Warrior course, such as the log grip and the jumping spider.

No American has ever gone farther in 'Ninja Warrior' than Levi Meeuwenberg, and he's headed back for another try. Let's take a look at this worthy warrior.

Go behind the scenes with free runner Levi Meeuwenberg and gymnast Mark Witmer as they battle it in the American Ninja Challenge 2.

Olivia Munn outlines some surprises in Stage One of the new 'Ninja Warrior' course to the contestants in the American Ninja Warrior Challenge. Spoiler alert: They made it h...

Free-running San Francisco madman Brian Orosco nearly finished the first stage last time around and has adjusted his training to include more arm and grip strength.

Go behind the scenes with Rick Seedman and Brian Orosco as they duel in the American Ninja Challenge.