I remember my first lucid nightmare. In waking life I have higher morals than most people, and I didn't think this would affect my dreams. I did something I'm not going to talk about, and suddenly everyone disappeared, and it became night. Then I saw a person down a corridor, and tried to get to him but he disappeared too. Then a door opened and Slenderman walked out (I'm terrified of him). I woke myself up and decided never to do anything bad in dreams again. It's odd, my subconscious seems to be a kind of law enforcer in my dreams. I once punched someone, and the dream became really annoying, not scary, but not a nice place to be. I got fed up and woke myself up eventually.