Do you know what that sound is?
It is Usain Bolt knocking on the door of the 200-meter World Record of 19.32, which is currently held by Michael Johnson.
On Sunday night, Usain Bolt put down 19.67 in the 200 without any heat in the Athens race. At this point, he's seeing where he is training-wise going into the Olympic Games, and at the same time, playing mind games with his competitors.
By Jay Hicks.