What is a Poltergeist?

Poltergeist comes from the German word meaning "noisy spirit". Current research indicates, however, that poltergeist activity may have nothing to do with ghosts or spirits. Since the activity seems to center around individuals, it is believed that it is caused by the subconscious mind of that individual. It is psychokinetic activity. The individual is often under emotional, psychological or physical stress. Effect can include rapping's on walls and floors, the physical movement of objects, effects on lights or other electric appliances. Even the manifestation of physical phenomena.