SUMMERTOWN, Tenn. (AP) – A haunted house that promises an extreme experience that can last up to 10 hours requires participants to be medically cleared by a doctor and sign a 40-page waiver.

The McKamey Manor experiences in Summertown, Tennessee, and Huntsville, Alabama, also require visitors be at least 18, insured, and pass a background check and drug test.

READ MORE: Pittsburgh's Fireworks Task Force Uses ShotSpotter To Help Crackdown On Illegal Fireworks

WFLA-TV reports that owner Russ McKamey offers thousands of dollars to anyone who completes the tour, but says no one ever has. He records each tour on video – for his own protection he says – and then posts them online, showing them quitting in humiliation.

READ MORE: 2 Injured In Drive-By Shooting In Aliquippa

It costs nearly nothing to enter: Just a bag of dog food. The website warns of physically demanding environments, but McKamey says the manor is a mental game.

MORE NEWS: Former VA Doctor Who Admitted To Fondling Women Sentenced To Probation

(Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)