Jamaican sprinter Usain Bolt and DJ Manny Norte (R) attend to the mixing boards at The Puma Yard in Brick Lane, east London early August 12, 2012. Bolt added the relay title to the 'double double' he won in the 100m and 200m, defending both after his Beijing triumphs and writing his way into Olympic history as one of the finest - and zaniest - sprinters the world has known.