 For instance, we'll take this because I just kind of ran into it with a friend of mine. There was a nice house, nice chimney, nice fireplace and everything. And he had noticed that maybe the top of the brick of the chimney was having, and around the mortar joints, was having a whitish discoloration. And he didn't get up on the roof. He had his binoculars. He kind of zoomed in and he was, you know...