4x6 - Jack Osbourne: Adrenaline Junkie

Jack Osbourne and his celebrity companions continue their quest to seek out the world's biggest adrenaline challenges. R&B star Craig David, presenter Emma Griffiths, and Huey from the Fun Lovin' Criminals join Jack to spend a terrifying night strapped to the side of a cliff, descend into the world's biggest hole, and learn how to box in Mexico City.