The main symptom of<unk>  is being unable to move or<unk> eak during awakening. Imagined sounds such as humming, hissing, static, zapping and buzzing noises are reported during<unk> . Other sounds such as voices, whispers and roars are also experienced. It has also been known that one may feel pressure on their chest and intense pain in their head during an episode. These symptoms are usually accompanied by intense emotions such as fear and panic. People also have sensations of being dragged out of bed or of flying, numbness, and feelings of electric tingles or vibrations running through their body.<unk>  may include hypnagogic hallucinations, such as a supernatural creature suffocating or terrifying the individual, accompanied by a feeling of pressure on one's chest and difficulty breathing.
Sleep paralysis
Narcolepsy
Sedation
Night terror
Sleep disorder
Hypokalemic periodic paralysis
Syncope 
Atonic seizure