" the firing of nerves in the amygdala, thereby dampening fear. Laughter, then, can help to temper negative emotions. And while all this might seem of purely academic interest, it could prove helpful when your partner breaks his leg at 19,000 feet in a blizzard on a Peruvian mountain. It is not a lack of fear that separates elite performers from the rest of us. They’re afraid, too, but they’re not overwhelmed by it. They manage fear. They use it to focus on taking correct action. Mike Tyson’s trainer, Cus D’Amato, said, “Fear is like fire. It can cook for you. It can heat your "

― Laurence Gonzales , Deep Survival: Who Lives, Who Dies, and Why