A hypnagogic, or hypnic jerk is a muscle spasm that causes somebody who is about to fall asleep jump, or jerk. People have reported to have felt as though they are falling, and scientists have said that causes of this may include anxiety, stress, and caffeine.
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Scary Facts
HorrorDid you know that cats are able to see spirits? Or that the universe could just explode in a few billion years? Those are just a few scary facts. In this book, I'll be telling you scary facts about life, death, Earth, space, and much more. So turn o...
