
A Tennessee haunted house is so horrifically scary that visitors have to pass several tests and sign a 40-page waver before being let inside — and no one has ever completed the whole experience.

McKamey Manor in Summertown, Tennessee has been billed as the scariest haunted house in the US.

It's so terrifying that even though owner Russ McKamey promises to award $20,000 to anyone who makes it through the whole 10-hour ordeal, not a single guest has earned the cash.

Freaky stuff! McKamey Manor in Summertown, Tennessee has been called the scariest haunted house in the US

Yikes... It has an extensive list of rules and requirements to visit, including a safe word and proof of medical insurance

The rules: Guests must pass a physical fitness test, a background check, and a drug test and watch video of past visitors to prepare

Signing away: There is even a 40-page waiver to sign, but thrill-seekers do it

There is an extensive list of rules and requirements to visit McKamey Manor.

Visitors need to take a sports fitness test, have a doctor's note clearing them mentally and physically, and have a background check.

They need proof of medical insurance, must come up with a safe word, and are required to sign a 40-page waiver.

Guests must also be 21 years old or older, or 18-20 with parental approval, and pass a drug test on the day.

Finally, there's the issue of payment: Russ requires a bag of dog food to feed his five dogs.

Then there's the video that visitors need to watch, which showcases 'every contestant who has ever attempted the new MCKAMEY MANOR tours.'

Big prize: Owner Russ McKamey promises to award $20,000 to anyone who makes it through the whole 10-hour ordeal, but no one has

Losers: If they don't win — and so far, no one has — they have to face the camera and say, 'You don't have to do this'

Insurance: Russ said he films contestants not just for this purpose, but also to protect himself

A warning: Visitors watch video of past contestants before entering

'This movie will explain in great detail what the Manor actual is, and what it is not,' the description says. 'Forget the crazy stories, this film will tell the truth to everyone including all future guests. Those partaking in the tour must clearly understand what will happen to each and every one of them.'

Russ said he films his contestants not just for this purpose, but also to protect himself.

'You’d be surprised over the years how many people have claimed something happened to them inside,' he told Fox 2. 'And I need to go back and show whoever needs to see it the raw and unedited footage, saying "Here ya go, here’s the complete show."

'When I use the hypnosis I can put you in a kitty pool with a couple inches of water and tell you there’s a great white shark in there, and you’re gonna think there’s a shark in there,' he said.

The boss: Russ (left) promises that his manor is just very, very scary — he's not hurting anyone

'I’m a very straight laced conservative guy, but here I run this crazy haunted house that people think is this torture factory, fetish factory. All of these things that it’s not,' he said

On TV: The house has been featured on Netflix's Haunters: Art of the Scare and an episode of Dark Tourist'

Adults only: Guests need to be over 21 and have a doctor's note

Mind your mouth! 'The manor is the most extreme haunt in the world but there’s no cussing involved,' Russ said

'And so, when you have that kind of power over people, and have them do and see things that you want them to see, then they can leave here thinking it really happened, and they’ll go to the authorities and say, "Oh, whatever," and I have to come back and show the footage and say, "It didn’t go that way at all."'

Russ promises that his manor is just very, very scary — he's not hurting anyone.

'I’m a very straight laced conservative guy, but here I run this crazy haunted house that people think is this torture factory, fetish factory. All of these things that it’s not, but people believe that based upon the films that I have made,' he said.

The house has been featured on Netflix's Haunters: Art of the Scare and an episode of Dark Tourist.'

There's also the matter of the prize: Anyone who manages to get through the whole ordeal will will $20,000 — minus fines for using profanity.

'More of an inside little joke — that the manor is the most extreme haunt in the world but there’s no cussing involved,' he said.

If they don't win — and so far, no one has — they have to face the camera and say, 'You don't have to do this.'