 That one produced a reinforcer. Hello, hello, hello. Hi, how are you? I'm gonna talk to you about our response cost today. Here's the easiest way to think of response cost. You shouldn't have a response. It's gonna cost you something. Probably something you desire, like your attractive face. So go ahead, keep pushing my buttons. It's kind of mean, right? Kind of nasty, kind of awful, right? That was a really bad example because the loss of your face doesn't make sense. The loss of your prettiness does. So anyway, that made it seem like positive punishment. It's not. Response cost, folks, is negative punishment. So the example that I was trying to give you was the loss of your attractive face, right? So when you lose your attractive face, because you said something so annoyingly stupid, right? Not that I'm condoning violence, but you never know when it happens. Anyway, so the point is, in the classroom, you might take away a kid who has recessed time. Response cost, you might take away a token that they've earned in order for a reinforcer. Response cost, that's the most common usage. I'd just like to find out their examples. All sorts of things that you can think of that if you engage in a baby, you're gonna lose something. Grounding is a classic example. So response cost, response cost is something.