The corpses in the rainy Poltergeist pool scene were real skeletons.
The cast and crew of the 2005 Amityville Horror kept waking up inexplicably at 3:15 a.m. while filming, which is the same time Ryan Reynolds' character mysteriously wakes up every night in the film.
In Candyman, Tony Todd had to fill his mouth with real bees.
Shelley Duvall, who played Wendy Torrance in The Shining, said the amount of emotional distress from filming was "excruciating" and "unbearable."
While filming Poltergeist, Oliver Robins, aka Robbie, truly got choked by the robot clown doll — it wasn't until he turned purple that Spielberg realized what was happening.
The actor who played a radiologist's assistant in The Exorcist was a convicted murderer who dismembered and killed gay men in the late '70s.
The schoolhouse in Hitchcock's The Birds is a real-life haunted house, and its current residents say they hear footsteps and children laughing.
While on the set of The Exorcist, director William Friedkin told the prop man to randomly fire shotgun blanks to get more "authentic" reactions from the actors.
During filming of the 2005 version of The Amityville Horror, a dead body was found floating in the water near the set.
Hannibal Lecter was based on an actual killer, Dr. Alfredo Ballí Treviño, who had the same mannerisms Anthony Hopkins portrayed in The Silence of the Lambs.
And multiple actors from the Poltergeist movies died tragically either during or after filming.
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