What does practicing medicine have in common with being a ninja warrior?

As an emergency room doctor, our guest today is an expert in dealing with high-pressure situations.

Dr. Noah Kaufman, the Ninjadoc, stars on the hit TV show "American Ninja Warrior." He’s an avid rock climber of over 25 years and holds a black belt in karate.

He's going to tell us what it's like to compete on the world's hardest obstacle courses—and how regular people can get off the couch and start climbing, too.