 Bolt set a new 100 m world record on 31 May 2008 . At the Reebok Grand Prix held in the Icahn Stadium in New York City , Bolt ran 9 @.@ 72 s with a tail wind of 1 @.@ 7 m / s . This race was Bolt 's fifth senior 100m . Gay again finished second and said of Bolt : " It looked like his knees were going past my face . " Commentators noted that Bolt appeared to have gained a psychological advantage over fellow Olympic contender Gay . 
