 He was, you know, kind of figuring out that it was some kind of staining or something along those lines. Finally, he took a picture of it on his phone and kind of blew it up, and he was showing me. I said, oh, that's efflorescence. I said, you got a problem with that chimney, or there's a good chance you got a problem with that chimney. He goes, well, what are you talking about? And I said, well...