Quiet Raving?
I think if I would have been there by chance, I would have felt lost, dazzled and stupid… I’m talking about all the crowd that gathered in Liverpool St. station (London, UK) to participate at the flash-mob and start dancing all together (19.24hrs. sharp) at the music of their ipods…
If you still didn’t get what’s strange in that, you should maybe watch the video… 
(ehm, couldn’t manage to embed this time… sorry!)
