For nearly a decade Kenichi Ito has been perfecting a running style based on Africa's wiry Patas monkey.
And it's meant that the 29-year-old now has a Guinness world record for the fastest time running 100 metres on all fours, at just under 20 seconds.
Ito explains how it all started:
For eight-and-a-half years Ito has walked around his local area in Tokyo on his hands and feet, and turned his household chores into challenges on all fours.
However it hasn't all been easy:
Constantly honing his style, Ito looks for inspiration from across the animal world and uses the internet and a season ticket to the local zoo to make sure he is getting the movements just right.
So far he's developed six distinct forms of all-fours movement from his top-speed "gallop" to a more leisurely walking pace, and has even recruited about 100 converts across seven countries.
While no-one at the London 2012 Olympics will be running on their hands, Ito says athletes of the future may well be converted, to what could be thought of as a more traditional form of running.