I've come across one or two haunted mailbox props, but they seemed more complicated than I want to try (e.g. pneumatic or complex circuits). I'm wondering if anyone here has a simple design. I just want the door to slam open and closed a few times, maybe put a bright light in and set it off with a motion detector. I might be able to come up with something on my own but figured I'd ask here before reinventing the wheel. Any suggestions?