More than 4,000 clubbers danced through the rush hour at Victoria station in Britain's biggest flash mob stunt.
Revellers responded to e-bulletins urging them to "dance like you've never danced before" at 6.53pm.
There were knowing looks and giggles among the casually dressed crowd that gathered from 6.30pm, wearing earphones.
A deafening 10-second countdown startled station staff and commuters before the concourse erupted in whoops and cheers. MP3 players and iPods emerged and the crowd danced wildly to their soundtracks in silence - for two hours.
More than 4,000 clubbers danced through the rush hour at Victoria station in Britain's biggest flash mob stunt.