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A woman was left incredibly confused when she came out of her home to find a trail of four-toed footprints strewn across her car.
Alicia Smith, from Scartho, Grimsby, was confronted by the bizarre frozen prints on Thursday morning (31 December).
The mysterious pattern starts near left hand corner of the windscreen and moves up and across and onto the roof before disappearing.
And while there is no fifth toe on either foot, it could just be that the culprit was walking very awkwardly due to the incredibly cold temperature.
Unsurprisingly, the whole thing left Alicia scratching her head as to how they got there and wondering who they belong to.
She and her partner have now shared their photos to see if anyone can shed some light on it.
"We'd never seen anything like this before, it was very odd," she said.
"They're a strange shape and only have four toes, and don't quite look human. I'm not sure if it was a child.
"And why would someone be barefoot in this weather?
"The car was parked outside our house all night so whatever did it must have been just outside. We didn't hear or see anything.
"It was 10.30am when we came out and spotted the footprints."
Adding: "We had no idea what made them, and wanted to see if anyone else had seen anything similar. We really want to hear people's suggestions on what they might be."
This is the latest mystery to have baffled people in recent weeks.
Last month, hundreds of dead birds were reportedly spotted falling out of the sky on a road near Llyn Llywenan, Bodedern, Wales.
Dafydd Edwards managed to capture a video of the unusual incident after his partner, Hannah, noticed the birds on her way back from a doctor's appointment on 10 December.
When she explained what had been going on, Dafydd decided to go and have a look see for himself as he 'didn't believe her'. Charming.
He was soon eating his words, telling North Wales Live: "My partner spotted it when she was on the way to the doctor's yesterday late afternoon.
"She said she saw hundreds of them flying over and thought it looked amazing, but on her way back around an hour later they were all dead in the road.
"I didn't believe her so I went to see for myself. It's very strange, I can't put my finger on it."
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