For decades, legendary magician David Blaine has completed record-breaking stunts that defy the impossible: He has held his breath for more than 17 minutes, was buried alive for seven days, frozen alive for three days, fasted for 44 days, caught a bullet fired from a gun in his mouth, and so much more. In his new National Geographic series David Blaine: Do Not Attempt, he travels the planet to learn from extraordinary performers. What drives him to probe our capacity for fear, risk, and pain? There’s nobody better to talk to Blaine about this than Diana Nyad, the first person to swim from Cuba to Florida without the aid of a shark cage, covering 110.86 miles in just under 53 hours. In this riveting conversation recorded at the 2025 Outside Festival, these two icons explore the art of human endurance.