BBC coverage of the closing ceremony of the 2008 Beijing Olympics included the (in)famous eight minutes prefiguring the London 2012 Games. A crude cartoon of a London bus becomes a reasonable representation of a Dennis Trident with Alexander body…….

…..but the 'bus' that appeared in the 'Bird's Nest' Stadium was an apparent Alexander Dennis Enviro 400….

…..that folded open to reveal a stage:

The chassis used for this amazing vehicle was in fact an Enviro 400.