 Oh, hey, what's happening? Brad here with reinforcer, which is a stimulus that is added or removed that increases the probability of a behavior happening in the future. So, the actual chocolate, not the delivery of the chocolate contingent on a behavior, but the chocolate itself, if it reinforces a behavior, is a reinforcer. Or being able to leave a room, the action of leaving the room and avoiding all the stimuli that were in that room, that action, I lost it mid-thought, yeah. You were there, you just confused yourself at the end. Yeah, there was just a train wreck in my head and there were no survivors. Anyway, all aboard and we're back on it. So, negative reinforcer would be the stimuli that is signaling or being annoying enough that you want to escape or avoid it. That itself is the reinforcer, the noise.