I found these like this, I swear. It reminds me of found poetry meets installation art. The setting - that box thing on that concrete wall - is just perfect for something like this. You could put anything there, and it would make an awesome photo.
Maybe I should leave a note and ask people to randomly leave stuff for me to photograph, and then I could print 4x6's and leave them on the wall for others to look at or take... Hmmm.