Sal, Adam & Justin interview American Ninja Warrior David "The Godfather" Campbell, 2015 finalist who you can soon see competing on NBC for the $1,000,000 prize in Las Vegas. (David's Twitter & Instagram @NinjaGodfather) David is no ordinary ANW competitor. He has been competing for the past few years in both the United States and Japan and is arguably the most successful American competitor of all time, earning him the moniker "The Godfather." In this episode David reveals how he trains and what goes on in the mind of a true American Ninja.