Hallucinations are false perceptions. This means that without any actual stimulation, the person sees or perceives something. Perception of a ghost in a lonely night is the best example of hallucination. The person does not see a ghost when he is in a group. This is clearly an indication that the person being a one in a dark night experiences a strong emotional state. Therefore, an European may see an European ghost, while an Indian may see an Indian ghost, and more particularly near the spot or location where they know their ghosts reside. These are all very interesting and fun. Is not it?