Usain Bolt, that freakishly fast Jamaican guy, ran the fourth
fastest 200-meter race in human history at the World Athletic
Championships in Daegu, South Korea today. He clocked 19.40
seconds. Only two people have ever run faster. One is named
Michael Johnson. The other is named Usain Bolt.  The fact he was
in lane three meant that he was cramped for room. "It put a lot
of strain on my body," and meant he could not accelerate
smoothly out of the bend into the straight. "It was so tight,"
he said, "that I had to be conservative and run a more technical
race."  Usain Bolt runs fourth-fastest 200m and claims he was
'conservative' [Guardian]  Usain Bolt Interviewed after Winning
200m at World Championships [YouTube]