You can experience it either right before falling asleep or as you’re waking up. Some of the symptoms include: inability to move your arms and legs, inability to speak, sensations of pressure against your chest (suffocation) or moving out of your own body, hallucination, and daytime sleepiness. It can least from a few seconds to up to 20 minutes and is accompanied with feelings of fear, panic, and helplessness.

Sleep paralysis is actually the result of normal biological processes. During REM sleep, which is the stage when most dreaming occurs, our brain switches off our muscles so we don’t physically act out what we see in our dreams. A paralysis episode happens when the mind wakes up before the body does. The outcome is that you’re conscious, but your body is still “asleep.”