I conducted a little photographic social experiment in the Montreal Metro. I call it the Law of Maximum Displacement. Strangers always space themselves as far away from each other as they can, neatly demonstrated by platform benches. I think it's really weird and bizzarre how predictable it is. A fun game is to look at these pictures and figure out the order in which the people sat. Comment the order you predict and let's see if 'everyone' guesses the same thing. You can't do it for all of them but some of them are strangely obvious.