The filming location is a real Halloween haunted house open to customers in the fall.
"Est aperta porta" is Latin for "the door is open."
Producer Joe Bandelli in uncredited in the movie, but plays Brock's camera man throughout the film (his second death as a camera man in the trilogy)
Similar to the first film, someone was needed to play the main clown. Producer Joe Bandelli donned the clown mask and costume throughout the film.
This is the middle movie of a conceived trilogy.