 All right, post-reinforcer pause. Post-reinforcer pause is an effect that happens in an organism, a person, a rat, a fish, or whatever when they're on certain schedules of reinforcement. Primarily speaking, the schedule of reinforcement would be that stepped effect, right? So that flat spot in responding on a fixed ratio schedule of reinforcement, that or even the flat spot on top of the fixed interval, right? So the scallop piece. That flat spot is considered a post-reinforcer pause. So you work hard to get your reinforcement, then you take a break, right? So in the United States, we have very long post-reinforcer pauses or very short post-reinforcer pauses for a very long behavior. You work for 50 weeks, then you take two weeks off. That's kind of a post-reinforcer pause, if you will, right? It's not a great example, but it works. There's a bunch of others. We do have some controversy in the field here. Some authors have rightfully identified that behavior actually starts with the pause before it accelerates, and that would be a procrastination pause. I'm specifically thinking of Michael Damien's book here. It's a great thing to think about, and we'll probably come back to it later.