Kicking off this year’s week on Nat Geo Mundo is Hombre vs. Chita with Tennessee Titans’ Chris Johnson — the NFL’s fastest running back — and Chicago Bears’ Devin Hester — the super-agile wide receiver and kick returner — both taking part in an extraordinary challenge to literally go one-on-one in a first-ever race with a cheetah at Busch Gardens Tampa’s Cheetah Run attraction. To prepare the cheetahs for the race, Busch Gardens Tampa trainers used training techniques to help familiarize the cats with new experiences, such as running next to a trainer separated by an 11-foot wall, and cameras high above the habitat. A month before race day, the trainers began working with the cheetahs conducting sprints using the same motorized lure system they were already using to stimulate the cats’ natural instinct to chase. Additionally, National Geographic Explorers-in-Residence and renowned filmmakers Beverly & Dereck Joubert present another stunning film from the bushes of Africa, Juego de Reyes; and big cat wrangler Boone Smith goes deep into a mysterious battle raging in the American heartland in Puma vs. Lobo. And our favorite cougar, Betty White, also joins this week in her special, Betty Wild.