Hallucinations refer to a kind of real and vivid perception without objective stimuli acting on the corresponding senses. Hallucinations are a type of perceptual disorder. They mainly include hallucinations, hallucinations, hallucinations, etc. , and they mostly occur in mental illness Under normal conditions, normal people may also appear under conditions such as tension, fatigue, and high fever. According to the above definitions, Which of the following are hallucinations:. ['The patient perceives the clouds in the sky like a flying fairy through imagination.', 'The sun tends to look bigger in the morning than at noon.', 'When timid Xiaolu was walking at night, he saw trees in the distance and thought it was a robber.', "As soon as mom left for work, Xiaofeng watched TV at home, but always felt that she heard her mother's footsteps from time to time."]