So I really don't know what happened here, but I'll share the story of one of my few LDs ever.
So I was sleeping in the room next to my brother's and I've been asleep for 5 hours. Suddenly I was starting to become lucid in a creepy sort of dream where I was fearing the dark, when suddenly at that exact time which the lucidity started my brother has to wake me up at 3:30am and I freaked the frig out and yelled 'til I was out of breathe. Apparently I started following my brother to his room. He and my parents said I was yelling and acted all frightened for about 40 seconds and went back to sleep when I was woken up, but I remember just sitting there in the bed for a long time scared. I don't remember anything but waking up and sitting there awake. But my family says I yelled loud. Is it normal to wake up like that screaming in the middle of a lucid dream that you are awoken from? I mean it was a dark scary dream, but I really had no reason to scream like a nightmare. What is this?