Throughout the years, Ken Erdey has learned that the big expensive props that jump out at you doesn't guarantee a scare.
"You walk pass those things and sometimes people know what's coming. But when you got actors and live people, they can play off each other and play off what they are seeing," Erdey said.
"It's amazing what people find scary and it's amazing what people don't," he said.
Because the haunt is a fundraiser for Plainfield schools, Ken Erdey says they can't use horror or torture scenes. He describes the haunt as friendly.
"You will rarely see a weapon in our haunt," he said.
He trains his actors that the surprise itself can produce the scare.
"As a group, one can be the distraction and one can get the scare. To me, it's how Scare High gets it's name. It's all about the scream.
"I have a goal I want to scare somebody completely, I want to have somebody being scared and I want somebody laughing the entire time, laughing at their friends for being scared," he said.
He instructs his actors to have four or five different acts within their scene so it doesn't get boring for them. And, it encourages guests to go again - they'll get a different scare!
"My hope is they come back and see something different each time," he said.
Erdey stands behind the scenes of the haunted rooms and listens for the good scream.
He was surprised to learn who was one of his best screamers: His daughter, Elaine Erdey, 12, a seventh-grader at Drauden Point Middle School.
She's now old enough to act in the haunted house. His son, Thomas Erdey, 10, a fifth-grader at Ridge Elementary School, will help out at the family haunt for young children.
"She's actually my best screamer. ... She's in the nurse's office. All I hear is this busted out scream. I was like 'What was that?' It was my daughter," he said.
So are you brave enough to visit the scariest high school in Plainfield?
Scream High Class of 2010 guarantees a good scare in the basement of the Plainfield Police Department, 14300 S. Coil Plus Drive.
The haunted house is open 5-8 p.m. tonight; 5-9 p.m. Friday and Saturday. Tickets cost $10 per person.
For younger children, ages 3 and up, there is a friendly-family scare with lights on and lights off from 1-4 p.m. Saturday. It's more of a fun tour of Scream High, showing off cool, gross stuff. Cost is $5 per person for the haunted house.
During that time, for free, there will be pumpkin coloring, demonstrations from the police and fire departments, crafts for kids and bouncies for kids to jump in. The event is sponsored by the Plainfield Police Department's D.A.R.E program and the Plainfield Fire Protection District.