Usain Bolt may be the fastest man on earth, but he's got nothing on 8-year-old Sarah. The Cincinnati Zoo's cheetah ambassador just beat the 2001 land-speed world record for mammals.

The previous record was set by a male cheetah from South Africa who covered 100 meters in 6.19 seconds. Sarah didn't beat that just once, but two times: She first clocked in at 6.16 seconds and then 6.13 seconds—which, by the way, bested Bolt's August sprint by more than three seconds. And that's from a girl who has been in captivity pretty much her whole life.

See the video here: