I have a double-sided sign on the glass door of my office at the library. When the door is open it says "Lucy Loomis, Library Director, is here," because when I sit at my desk no one can see that I'm actually in my office. When the door is closed and I'm out and about, it says "Lucy Loomis, Library Director, is elsewhere," so people know I'm not actually in there, hiding.
I was just doing a search on flickr for photos of Cape Cod, and what should I find, but this photo, taken by a total stranger. Check it out!