A television journalist bumped into a fixed railing and fell on his back, shooting the scooter into Bolt's legs from behind, Beijing, Aug 27. [Photo/CFP]

Usain Bolt's celebrations after completing a world championship sprint double came to a painful halt on Thursday after he was knocked over by a cameraman on an electric scooter.

The local television journalist bumped into a fixed railing and fell on his back, shooting the scooter into Bolt's legs from behind and sending the Jamaican crashing to the ground as he posed for photos following his gold medal run in the 200 meters in Beijing.