In San Diego, chefs Aarón Sánchez and Roger Mooking tackle the hottest pepper they've ever tasted. It's a Naga Viper drenched Pork Carnitas challenge, with the loser singing for his food, Mariachi style. Plus, Charger football legend Junior Seau's restaurant for the hottest Ahi Poke in Southern California, and an island fiery favorite, Mango Pepper Shrimp.