(Video Link)
Do you remember the the head-crushing sketch from The Kids in the Hall? Artist Chris O'Shea created something like it, but on a grand scale, in this augmented reality demonstration. As the people of Liverpool walk along the city streets, they are projected onto a huge LED screen. A giant hand appears on the screen and torments or picks up their images.
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Did I just read a Warcraft reference?
http://vimeo.com/10511181