Even in a serious place like a bookstore there are people who surreptitiously show off their sense of humor. I frequently find books misplaced on purpose, especially in the science/religion sections which happen to be side by side. And, no, I didn’t do that on purpose (put them together).
One day I found “Poe,” my raven puppet, with his wing casually draped over the back of the chair. Now we know he did not do that by himself.