Titans running back Chris Johnson is racing a cheetah. Yep arguably the NFL's fastest player is racing the planet's fastest animal. Johnson won't be alone: Bears returner Devin Hester is racing too. It's all part of Nat Geo Wild's Big Cat Week kickoff special "Man vs. Cheetah" which will air in November. "This is most incredible challenge I've ever faced" Johnson said according to TheWrap.com. "I wanted to go up against the fastest in the world and test myself and this was it!” More details via TheWrap.com: "Man vs. Cheetah" will not only look at how the cheetah's speed maneuverability and instinct all come together but it will reveal the key advantages and the vulnerabilities of the contestants. The special addresses whether cheetahs have hidden weaknesses despite their all-out running power and whether comparing them to humans might reveal new information about cheetahs' potential for survival in the wild. The margin between cheetah speed and human ability is shown to be razor-thin with factors like agility endurance and the human ability to strategize and adapt leveling the playing field.