Diane: You were saying about poltergeists.
Dr. Lesh: Poltergeists are usually associated with an individual. Hauntings seem to be connected with an area. A house usually.
Marty: Poltergeist disturbances are of a fairly short duration. Perhaps a couple of months. Hauntings can go on for years.
Diane: Are you telling me that all of this could just suddenly end at any time?
Dr. Lesh: Yes, it could. Unless it's a haunting. But hauntings don't usually revolve around living people.
Diane: Then we don't have much time, Dr. Lesh, because my daughter is alive somewhere inside this house.