Many people who experience sleep paralysis see frightening hallucinations some call "sleep paralysis demons." (Leah Abucayan, Alberto Mier, Illustration/CNN ) ...

Illustration by Leah Abucayan/Alberto Mier/CNN via CNN Newsource Many people who experience sleep paralysis see frightening hallucinations some call "sleep paralysis demons." ...

Around 30% of people will experience sleep paralysis at least once. Here’s why and what you can do about it.

In the shadows, a figure watches you, but you are powerless to scream in your sleep. This isn't just Sonakshi Sinha's ghost ...

Illustration by Leah Abucayan/Alberto Mier/CNN via CNN Newsource Many people who experience sleep paralysis see frightening hallucinations some call "sleep paralysis demons." ...

Sleep paralysis may come with other sleep disorders such as narcolepsy. Narcolepsy is an overpowering need to sleep caused by a problem with the brain's ability to regulate sleep.

Around 30% of people will experience sleep paralysis at least once. Here’s why and what you can do about it.

Around 30% of people will experience sleep paralysis at least once. Here’s why and what you can do about it.

Many people who experience sleep paralysis see frightening hallucinations some call "sleep paralysis demons." (Illustration by Leah Abucayan/Alberto Mier/CNN via CNN Newsource) ...