Harry Potter and the Prisoner of Azkaban

The triple-decker bus

Harry Potter travels on a triple-decker bus in Harry Potter and the Prisoner of Azkaban.

Daniel Radcliffe is back again to play Harry in his third year at Hogwarts and he escapes in the Ministry of Magic bus after he is confronted in the street by Sirius Black in the form of a black dog.

On the bus Harry finds dozens of wizards lying on beds while they wait to reach their stops. The Knight Bus is used to rescue wizards in distress.

The bus can take them anywhere - except underwater - and clears a route through London in the most spectacular special effects in the movie.

But the scene was considered too dangerous for star Daniel, 13, and a stunt double takes his place.