 Are you a stimulus? I'm a stimulus. Brad Beck, there's a stimulus. The camera's a stimulus. These lights are a stimulus. This thing's a stimulus. I guess the real question is, are you a stimulating stimulus? I suppose you are if you're a stimulus. It doesn't have to be naughty, but it could be. Anyway, the point is it's simple. A stimulus. We talk about them all the time and apply behavior analysis and experimental analysis of behavior, right? It's nonstop. We talk about SDs. We talk about SRs. We talk about stimuli that do this and stimuli that do that in a responded stimulus. Oh, these stimuluses. But really, all it really means is, can you detect something? If you can detect it, it's a stimulus. Can you see it? I can see the light. Therefore, it's a stimulus. Can I hear it? I heard Brad exhale. So therefore, that's a stimulus. You could punch me in the head. If you watch another video, here's a challenge for you. Find the video in which Brad shoots me with a cannon. That cannon was a stimulus. So all sorts of things can be stimuli. If you can detect it, it's a stimulus. So, nothing else.