You may recognize the name from the horror movie franchise 'Poltergeist.' But did you know that a series of macabre events affected the cast after filming? So much so that these episodes became known as the 'Poltergeist curse.'
Skeptical about the phenomenon? Read through the gallery and draw your own conclusions about poltergeists.
According to Metro, the term derives from two German words: "Poltern," which means to make noise, and "Geist," which means ghost.
According to The Paranormal Society, each phenomenon can begin subtly, and then become more intense with voices and apparitions featuring.
Some people believe that poltergeist activity is associated with disturbing spirits, says Live Science.
Cases of possession by poltergeist energy have been reported. The person usually isn't aware of the event, Metro reports.
Metro further states that exorcism techniques are used to remove a poltergeist. This is usually a time-consuming and difficult process.
The poltergeist phenomenon has been portrayed in many movies and some of the behind-the-scenes stories are pretty scary.
Coincidentally or not, many actors died after shooting supernatural movies.
The movie 'Poltergeist' was released in 1982 and told the story of a family being tormented by poltergeist activity.
The first tragic event happened the same year the movie hit the theaters. Dominique Dunne, who played Dana, was strangled to death by her boyfriend.
'Poltergeist II: The Other Side' was released in 1986, and another tragic event took place that year.
The most-remembered character in the trilogy is undoubtedly Carol Anne, played by the young actress Heather O'Rourke.
She died of cardiac-pulmonary arrest and septic shock, due to an undetected intestinal blockage, People reported at the time.
In 2015, another version of 'Poltergeist' hit the big screen. The movie directed by Gil Kenan tells the story of a family tormented by spirits.
Mind power? Spirits? Demons? Imagination?What do you think poltergeist activity really is?
See also: Helpful ghosts from around the world
The terrifying truth about poltergeists
The paranormal phenomenon that inspired horror movies
LIFESTYLE Poltergeist
You may recognize the name from the horror movie franchise 'Poltergeist.' But did you know that a series of macabre events affected the cast after filming? So much so that these episodes became known as the 'Poltergeist curse.' Skeptical about the phenomenon? Read through the gallery and draw your own conclusions about poltergeists.