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REUTERS/Kim Kyung-Hoon
Kenichi Ito, known as the "world's fastest man on four legs", crosses the finish line while a Guinness World Records official times his record for the 100-metre challenge, in Tokyo November 15, 2012. The 30-year-old Ito who developed his skills for 9 years based on the running style of the African Patas monkey, broke a new Guinness World Record on Thursday, clocking in at 17.47 seconds.

AP Photo/Koji Sasahara
Kenichi Ito runs on a race course on his way to setting the Guinness World Record for the fastest time to run 100 meters on all fours at Komazawa Olympic Park Stadium in Tokyo, Nov. 15, 2012.

REUTERS/Kim Kyung-Hoon
Kenichi on all fours.

REUTERS/Kim Kyung-Hoon
Kenichi Ito reacts after breaking a Guinness World Records for the 100-metre, in Tokyo November 15, 2012.

AP Photo/Koji Sasahara
Kenichi Ito shows a watch displaying the Guinness World Record time of 17.47 seconds.

REUTERS/Kim Kyung-Hoon
Kenichi looks at his new Guinness World Records certification.