However, it should be noted that the stimulus source of shock reaction is not necessarily an objective thing. For example, when I was walking on the road, I suddenly heard a tire burst/firecrackers/popcorn/balloon burst/or other huge explosions caused by other reasons. I was shocked. These are typical sources of shock and stimulation. But some people are stimulated and frightened by subjective consciousness. For example, people with auditory hallucinations seem to hear someone calling their names, but they are shocked. In fact, no one called him. For example, the shadow outside the window was mistaken for a ghost, and the result was scared; There are things like waking up from a nightmare, which are all caused by non-objective stimuli.