Chicago's Millennium Park is a great place for photography. There are several cool things there, and one of them is this giant video wall. It has this strange glass brick-like covering and shows unusual images of people softly smiling at you. It reminds me a bit of big brother, as if there is a tiny camera behind there that the government is using to ensure that your park activity is appropriate.
I waited quite a while for some people to stand in front of the thing so I could capture a sense of scale. Then, by luck, a man and his young son walked up to it, which gave the perfect look. Furthermore, it was lucky that this part of the video loop was on the screen, since it was one of my favorites and probably mimicked the reaction of the guy standing there watching it.