S is for Sleep Paralysis

Sleep Paralysis is the phenomena of being conscious but not being able to move. Some have described it similar to waking up dead because their mind is awake but their body is not. 
During REM sleep the brain tells the body’s voluntary muscles to relax. They enter a state of near paralysis called atonia and this state protects your body from acting out physical movements in your dreams and preventing injury. 
When atonia does not happen people can act out their dreams and thrash about...