That is VERY cool!! I'd love to do one of these, but have a hard time getting one stranger photo, never mind three! Oh, I wonder if it's a whole body shot and then cropped three time? hmmmm
Very cool, but then when I saw the link provided by @indiannie_jones I loved the idea even more - because these aren't just photos of strangers, they're a (weird sorto of) portraits of real people! I might have to give this a go with some members of the family over Christmas and see what happens!
http://www.flickr.com/photos/valentinangiuli/sets/72157627060089145/