Sleep paralysis that occurs just as we begin to wake up may produce bizarre episodes in which people may feel something pressing on their chests or think there are space aliens, angels, or demons in the room with them. This describes what is referred to as

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Hypnopompic hallucinations occur as a person is waking up, often involving vivid and sometimes frightening sensory experiences. These can include the sensation of pressure on the chest or visual hallucinations of entities in the room, distinguishing them from the other options listed.

Sleep Paralysis That Occurs Just as We Begin to Wake