Amazon.com description: Product Description: A poltergeist is defined as a disturbance or energy with bizarre physical effects of paranormal origin that suggest mischievous or destructive intent, such as breaking or moving objects and loud knocks or noises.

The Poltergeist Phenomenon is an exciting, original look at an old subject by an award-winning investigative reporter. The author has reviewed 75 cases and interviewed hundreds of witnesses, paranormal experts, law enforcement officers, psychologists and skeptics to come up with eye-opening results:

The typical poltergeist case involves a young person from a repressed home who is going through puberty. He or she may have epilepsy, which produces recurrent spontaneous psychokinesis, a state in which gravity is temporarily suspended.

A respected former Princeton University scientist believes he has proven in laboratory experiments that psychokinesis exists and that poltergeist cases are probably true.

This rare energy may be part of a person's fight-or-flight system, which is hardwired into everyone and can erupt in certain conditions.