Wozniak capped their routine by doing his version of the break-dance move known as "the worm, " but even that failed to save his lackluster performance.

CNN: Fans keep Wozniak 'Dancing With the Stars'

But normally, save for the odd urban explorer or raver illegally slipping onto the tracks for a nose around or a dance, this eerie world of shadows and ghosts has been all but forgotten.

BBC: Reawakening the Underground