Perhaps the stone guard is intent, motion, or sound sensitive. I wonder if it activates a sales pitch... Something along the lines of "Welcome to Graveyard Castle, former home of litch king Grease Meatgrinder. Tickets to the Crazy-like-a-fox memorial are available in the lobby. Don't forget to enjoy a cup of free coffee as you browse our bookstore. Enjoy your stay and don't forget to watch our documentary about ancient aliens featuring a detailed account about how the walls were painted in blood. Also, we have evangelists and Jenova's witnesses on staff waiting to interview you after the experience to ensure quality service in addition to offering you a free gift and an opportunity to purchase a time share to our lovely village... Home of the legendary Ylvys. And remember, we don't want your money. It's for the children.