She discovered a hole in the ground that measured about 15 centimetres (six inches) across and just under a metre (three feet) deep, leading some to speculate she had found the impact crater from a falling meteoroid.
It all started when North Yorkshire police were called to the Hopgrove area of the city after a local woman, Silvia Mercer, said she had heard a rush of air and a loud explosion while she had been out walking her dogs.
Armageddon it was not, but Mrs Mercer was certainly terrified: "It was a bit of a shock," she said. "I thought my last moments had come. I was very shaken."
She discovered a hole in the ground that measured about 15 centimetres (six inches) across and just under a metre (three feet) deep, leading some to speculate she had found the impact crater from a falling meteoroid.
The police cordoned off the area and even called in the bomb squad. For a while, it was said a hot, smouldering meteorite lay at the bottom of the hole.
But after a day's investigation, the real story emerged. The event that frightened the life out of Mrs Mercer was not a falling space rock but the small explosion caused by a short circuit in an underground electricity cable.
The truth is a little disappointing. A meteorite find would have been a big event. The last recorded find on the UK mainland was nearly 10 years ago.
In 1991, civil servant Arthur Pettifor recovered a 767-g (27 oz) lump of space rock that hit a hedge in his garden in Glatton, near Peterborough.