Graveyard visitors got far more than they bargained for during a terrifying ghost tour.

The petrifying story behind the Mackenzie Poltergeist is set to be explored in a horrifying new series, Hauntings, which follows some of the world’s biggest unsolved paranormal activities.

For the uninitiated, The Edinburgh Executioner follows the spooky story of George Mackenzie, who was responsible for upholding Charles II’s laws in the 17th century.

Nearly four centuries later, on the night of 1998, a homeless man entered Mackenzie’s tomb in Greyfriars Kirkyard in Edinburgh (the same place where Mackenzie prosecuted criminals), but not only did he break in, he actually fell into an assembly of decomposing corpses.

While his screams could be heard overground, something far more sinister had been disturbed, and over the next few weeks, stories of blackouts and inexplicable paranormal attacks began to spread.

Jan Andrew-Henderson, despite the tomb becoming locked up and declared out of bounds by the council, set out to explore the poltergeist, but during one of his early tours, he witnessed terrifying attacks that were completely mysterious.

Jan Andrew-Henderson saw disturbing things during his ghost-tours (Picture: Paramount+)

He described one man falling down like someone had ‘hit him with a baseball bat’ (Picture: Paramount+)

‘It soon transpired that we didn’t have to make up the ghost stories,’ he explains, about leading ghost tours through the graveyard.

‘After a few weeks, I was doing a tour, talking away, and suddenly… this man, he just went down, onto the concrete floor.

‘A whole bunch of things went through my mind, and the first one was nothing to do with the supernatural, the first one was, “Should I call an ambulance?”

‘He went down like somebody had hit him with a baseball bat.’

He was left with marks on the back of his head (Picture: Paramount+)

Bruises were found on multiple visitors (Picture: Paramount+)

The clip shows the original image of the back of the man’s head, with harsh red marks across his head and neck, as if someone had hit him with a bat.

Except, there was no one physically around that could have done so.

Jan continues: ‘The rest of the tour was different, the people inside the mausoleum were scared, properly scared.

‘And then it happened again, two or three days later, exactly the same thing.

‘I saw the scratches appear on someone’s face’ (Picture: Paramount+)

‘The guides themselves, they struggled with the things they were seeing as well.

‘One of the guides came and said to me, “I saw the scratches appear on someone’s face.”

‘Like they weren’t there, and suddenly they were.

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‘After that, his whole demeanor changed, when he finished a tour he wasn’t happy and joking about it anymore, he was disturbed by what he was doing.’

We can’t blame him…

Hauntings drops on Paramount+ on Friday, October 28.

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“I saw the scratches appear on someone’s face.”