Video: 'apeman' is the world's fastest four-legged human, Kenichi Ito.
Kenichi Ito, a Japanese man aged 29, lives in Tokyo, and officially became the world's fastest man walking on all fours, or four limbs, the same style of monkeys.
Thus, the Guinness Book of World Records recognized him as such, when Ito clocked just under 20 seconds in the 100 meter dash.
Note that this feat took eight and a half years of training after developing even six different styles of movement as quadruped.