Chicago Bears speedster Devin Hester and Tennessee Titans running back Chris Johnson are wicked fast. But how fast are they compared to the world's fastest?

Of course, you'll have to wait until National Geographic airs the race between the beast and men later on this fall, November to be exact, as a part of NatGeo Wild's Big Cat Week.

Johnson reflected that the race was the "most incredible challenge" that he's ever been a part of, so you know that the two men at least hang with the cheetah for a little bit.

As for the future? Johnson says he wouldn't rule out racing an elephant...another African beast surprisingly known for speed.