Usain Bolt came crashing down to earth after his 200m final victory celebrations were interrupted by a rogue cameraman on a Segway.

Having blown away his rivals with a time of 19.55 to claim his second gold of the Beijing World Championships Bolt was deservedly basking in the adulation of the crowd.

His victory lap was interrupted however in a video you can see below, as a cameraman following him on a Segway ploughed into him, bringing both crashing to the ground. Hitting his man from behind: that would be worthy of a straight red on the football field.

However the unfortunate incident is unlikely to take the sheen off a thoroughly impressive victory for the four-time world champion, who had had one of his toughest years in the sport before roaring back with impressive victories in the London Olympic Stadium and the Bird's Nest.

Coming into the race all the talk had been whether Justin Gatlin would gain revenge for the Jamaican's victory in Sunday's 100m final, but the American could not keep up with the world's fastest man.