Waking from a frightening dream, hearing noises; how far does it go when your scared and alone. With all the hidden terrors in all world hallucination is far most the worst. One day realizing that your conscience has gotten louder has got to be the most frightening sounds you could ever experience. Hallucination is defined as sensory perception in absence of external stimuli. There are three characteristics: thoughts or memory images, perhaps when they are as vivid and immediate as perceptions, are experienced as if they were perceptions; they ....