26, 1999 at the World Championships in Seville, Spain.
He leaned at the finish line, which he really didn't need to do, as Kirani James (43.76) of Grenada and LaShawn Merritt (43.85) of the Unites States weren't even in the picture.
James, the defending Olympic champion, finished with the silver and Merritt, who won gold eight years ago in Beijing, hung on for bronze as he staggered across the line.
Instead of collapsing at the finish this time, Van Niekerk dropped to one knee and put his head in his hands.
As he did so, Van Niekerk pointed at the clock to make sure everyone saw his time.