 Yes, and there's lots of things you can do if you can't see above like you, John. Sometimes it's a two-story house. You can't see what's in that wall, and if you're on a slab, you can't see it from the bottom, so you're kind of hemmed in. But there are methods, and someone that's versed in construction can come out, and they can help you with those things. A couple of simple things are...