While people who sleepeat are acting because their brain is having trouble controlling instincts during deep sleep, people who have "night terrors" act—sometimes quite violently—on what their brain thinks is happening. People suffering from night terrors typically flail around, hallucinate and scream.
Night terrors are not the same as nightmares. "There's a big difference," Dr. Oz says. "Nightmares happen when you're in the dream phase of sleep, when you're actually paralyzed so you can't move to respond to the nightmare and you actually usually recall it. … If you're in that deep hibernating sleep and you have one of these night terrors, your whole body responds. Your heart rate goes up. You start sweating. It's much more than just a bad dream."
Ashley says she has been having night terrors since she was a child. She set up a camera in her bedroom to document one of her regular night terrors and captured a video of her letting out a scream worthy of the scariest horror movie.
Does she remember what caused such a fright? "Not that particular dream, but it was most likely about bugs. About 95 percent of my dreams that I have that cause me to scream are about bugs—spiders, grasshoppers," Ashley says. "I don't like [bugs], but I don't have a phobia, per se. But in my dreams, I'm much more afraid of them. In my dreams, the bugs are also attacking me. They're much more aggressive in my dreams than they are in real life."