 like a stainless muffler or something, and they don't worry about the rust, or they're like, hey, maybe you'll buy another one if they fail down the road, or they're not driven as much because it's a collector or something, performance car. So they don't drill them, and they don't drip out, so they end up coming out. As it collects in there, it ends up coming out the tip of the exhaust, and it's really dark, dark-colored, almost like oil, and it can even get sticky. It's got so much sludge in it.