The owners of a suburban Detroit haunted house are keeping count of how many guests skedaddle before completing their journey through each of the attraction’s four levels.

They also track the number of guests who either faint, vomit or wet themselves.

Visitors to Erebus (AIR’-eh-behs) Haunted Attraction are greeted in the lobby by the Wimp Out Score Board, which provides a running digital display of “wimps” and “wetters.”

“We don't really count the tally number of how many people are going through,” operations manager Zac Terebus (teh-REE’-behs) said. “What we do count is the people that don't make it through.”

And how does Erebus achieve a level of terror that results in early exits and damp drawers?

Scare School, of course.

There, actors learn to be as frightening as humanly — or rather, supernaturally — possible.

“Scare School really comes down to the psychology of fear,” Terebus said. “Fear is not an accident. Fear is an art.”

In the weeks before Erebus opened for the Sept. 19-Nov. 2 Halloween season, Terebus and other decision-makers auditioned and hired dozens of scare actors, then sent them to school.

In an upstairs room, Erebus veterans schooled the newbies on the finer points of zombie shuffling and demon shrieking, walking on stilts and wielding a spiked (plastic) club. The new hires also learned about make-up application, costuming, how to get into their roles and personas as well as rules about interacting with the guests.

It’s all part of an effort to bring out their inner fiend, said Brad Terebus, Zac’s brother and a fellow operations manager.

“We just teach them how to scare safely, how to have fun while you're scaring and the psychology of a scare,” Brad Terebus said.

Alan Tucker portrays a bloodthirsty clown. He said scare acting is “therapeutic.”

“You never really think that you can be something else for a couple hours and scare people. But then when you really actually get to do that, it’s so entertaining. It’s so fulfilling,” said Tucker, who is in his second year as a scare actor.

Renee Piehl (PEEL’) is in her third year, this time around playing Nyx, based on the Greek goddess of night, who scares guests waiting in line to enter the haunt.

“They come here to be scared. It’s Halloween. It’s fun," she said. "We are to be ugly and scary and bloody.”

Plus, the scarier the actors are, the bigger the numbers will get on the Wimp Out Score Board.