BERKELEY, Calif. — Baland Jalal lay in bed terrified, experiencing his own real-life horror film. Newly awake, the 19-year-old could see his surroundings but couldn't move or speak, and he didn't know ...

It’s the stuff of nightmares. You wake up, and you can’t move your body. A shadowy figure looms over you, but it feels too real to be a dream. If you’ve experienced this, you might have had a sleep ...

Add Yahoo as a preferred source to see more of our stories on Google. Maybe you’ve seen the meme: “This is my sleep paralysis demon: [insert photo].” The viral idea builds on a very real condition in ...

Add Yahoo as a preferred source to see more of our stories on Google. While prevalence varies (one study found it in as many as 38% of participants) researchers believe that generally, about 20% of ...

Many people who experience sleep paralysis see frightening hallucinations some call "sleep paralysis demons." - Illustration by Leah Abucayan/Alberto Mier/CNN Sign up for CNN’s Sleep, But Better ...

You may experience sleep paralysis if you wake during the dream phase of sleep. You may be more likely to see hallucinations during the rapid eye movement cycle. You wake up in the middle of the night ...

Imagine waking up in pitch darkness paralyzed from head to toe. You try to scream but can’t. Suddenly you realize there is a ghost with bloody fangs hovering over you. Before you know, the creature ...

Maybe you’ve seen the meme: “This is my sleep paralysis demon: [insert photo].” The viral idea builds on a very real condition in which a person is conscious but unable to move. In some cases, people ...