Shadow Entities and the Hat Man are seen in the Hypnogogic state. There are two forms of sleep related hallucinations which are called hypnogogic (hypnogogia) and hypnopompic (hypnopompia) hallucinations. Hypnogogic hallucinations occur just before sleep, and may be accompanied by sleep paralysis, a state in which the subject is physically immobile, but fully conscious. Hypnogogia and sleep paralysis often cause fear. Common hypnopompic experiences include the sensation of falling and the feeling of a presence in the room.