What is it about human nature that makes this phenomenon inevitable? A Flickr stream has been collecting pictures of (relatively) ordinary folks from all over the world who visit the leaning tower of Pisa and all decide to take the same wacky picture, positioned between the camera and the tower in such a way that it appears they are holding it up. What prompts people to do this? Is it some deepseated instinctual response? Do they simply see others doing it? Beats me. Pretty funny though.

Flickr Stream of Pisa Pushers