 Alright, here we are with Unconditioned Negative Reinforcer, which is all to do with phylogeny. Think caveman ancestors and things we kind of learned through, uh, fucking, um, so it makes avoidance or escape reinforcing. So whatever behavior happens from a stimulus, the behavior gets out of the way. Big one to think about that's Unconditioned, that's the big word here, Unconditioned Phylogeny, would be pain. So being able to escape pain. So running into a door, say a window door, a window door. I know what I'm talking about, trust me. A glass door, you're running into that once, you're probably not going to do it again from the pain. Slamming your hand in the car door, same type of thing, you're most likely not going to keep your hand, um, in front of the car door, just to get away from door falling off of a ladder. Climbing in heights, you fall off from a certain height, you're probably not going to want to climb that high again. Unconditioned, negative reinforcer.