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Robbie and Heather Luther created the haunt called The 17th Door.
"There's a lot going on, where it's very interactive and immersive and kind of invades your space. You will get touched and you might get wet," Heather said.
Once curious visitors step through the door, they're inside the demented head of Paula, a first-year student at Gluttire University.
A group will spend about a minute in 17 different rooms, each with a unique theme and created with a painstaking amount of detail. All of them are filled with monsters lurking around every corner.
The Luthers and their team began construction on the house in April.
"A lot of money, a lot time, a lot of effort, a lot of sweat and some tears - not his, mine," Heather said.
Another difference between the 17th Door and a traditional haunted house is that once the doors are closed, the only way to get out is to use the word "mercy."
So far, about 350 people have used the safe word, Heather said. And that is just two weekends into the house's opening. Luther said on average they are getting about 800 visitors each night, and most of them said the house is "intense."
"It's super intense. I've actually worked in haunted houses as an actor myself and this is very, very intense, very scary," Moreno Valley resident Monique Martin said.
Tickets cost between $21 and $35. The house is open on select days until Nov. 1.