When Bassam Tarazi set out to hike the 23-mile Presidential Traverse in New Hampshire, he wasn't worried. It was a nice summer day, he had a lifetime of mountaineering experience behind him, and compared to his other outdoor conquests, this would be easy.

But over the course of the next few hours, he would come to realize what a dangerous miscalculation he had made. It was a miscalculation that would scare him to the point of tears and would cause him question the value of his own confidence.

On this episode, he shares his story. It's a story about what happens when your inner teenager takes over -- when you cross the invisible line between confidence and cockiness.