Poltergeists for many years were thought to be entities that exhibited cruel and destructive behavior. In virtually all cases, families who live in homes infested with these unwelcome guests claim household objects fly through the air on their own, sometimes with great force. Doors will open and close, lights will turn on and off and furniture will rearrange itself. In rare cases things have turned ugly and some people ended up with bruises, cuts and scratches. Poltergeists are indeed frightening occurrences within the supernatural realm.
The cause of these disturbances could be the result of somebody in the house experiencing psychological stress. The person can't deal with the pressure in a normal way, so the subconscious mind takes over and the individual's anger and despair are projected in a psychokinetic fashion. The agent as they are usually referred to, is not aware they are causing the problem. There are exceptions of course, such as the Bell Witch Haunting in the early 19th century.
How to Deal with Poltergeists
As in any kind of paranormal event, it's important to document everything. Write down the time, date, weather, location, person experiencing the event, stress level and anything else that pertains to the occurrence. Retain the services of a professional counselor, and try to eliminate any negativity in the household.
Documented Poltergeist Cases
These incidents have received much attention in and out of the scientific community.