emotional feedback loops

Emotional feedback loops can occur between two people, such as a fight that gets worse and worse, or falling in love. There are also some interesting loops that can happen with just one person. Something will make me happy, and then I'll notice that I'm happy, and if I'm in the right mood that fact will make me happy. Or if I'm in a dark basement and I start paying attention to the fact that I'm afraid, it will make me more afraid, and soon I'm running in terror and that makes me more afraid. I think when this happens with anxiety it's called a panic disorder. Children crying will be made miserable by the fact that they are crying, and will sometimes even express to you "I can't stop crying!"