A man who invented a computer game simulation of a global thermonuclear war had the police called on him by his letting agent who feared he was really planning to destroy the planet from his bedroom in Bristol.
The agent visited Henry Smith's rented home in Bristol and saw a crude map drawing of a missile attack on Washington and called police fearing Armageddon was just around the corner.
The software engineer had pre-arranged a visit from the letting agent, and was bemused to receive a call a couple of days later from the agent questioning just what he was up to with a rudimentary hand-drawn plan of a nuclear warhead's trajectory over the Atlantic.
He explained that it was just for a computer game he was developing, and thought that was the end of it, but then received an email saying the agents had referred "the matter" to the police.
"At first I was ridiculously frightened by the whole thing," he told the Guardian. "When they said they'd told the police I ran home to check if the police had raided the house or something.
"It was definitely very frightening to think that the police had a report in their system alleging that I was up to something suspicious involving nuclear warheads.
"Knowing how the police here deal with suspected terrorists, I was worried they'd do a dawn raid or worse. It was genuinely scary for a while," he added.
Presumably either too busy, or maybe not that worried about stopping the destruction of all life on Earth being planned from a front room in Bristol, the police have not yet knocked on Mr Smith's door.
The game designer said the agent's "judgement has let them down".
"Nobody is planning an intercontinental ballistic missile attack by Russia on Washington from a rented house in a Bristol suburb. And definitely not by drawing their missile trajectory freehand on a whiteboard," he said.
"And even if they were, they wouldn't have left those whiteboards out on the pre-agreed day of a visual inspection," he added.
The first prototype of the game developed by Mr Smith from his home in Bristol can now be be found online at www.global.thermonuclearwar.org.