A group of cyclists got the hump after strange, snake-like eruptions burst through a path and sent riders flying.
Veteran pedaler Rob Ainsley said he had never seen anything quite like it.
The rock-hard ridges appeared on the cycle path and some grew to around 200-foot-long and 2.5-inches high.
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It happened in New Earswick, near York, north Yorkshire, as reported by What’s The Jam.
Rob said: “They were perilous, like tree-roots’ evil, mutant twins.

“I know of a few unlucky riders who came a cropper on them in the dark.
“Climate change is to blame.
“The unprecedented dry spell in the summer formed cracks in the path, wide enough to swallow a front wheel.
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“York City Council diligently filled them with some sort of tarry goo.
“But then, in the winter, long, unprecedented wet spells swelled the ground on either side.
“It forced the gooey filler up and out forming the treacherous snakes.”
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“The council responded fast and put their shavers and slicers to work to level things off.
“But alas, some of the lesser ones they left unskimmed – or maybe totally new ones – have since expanded or emerged.”

The council said the issue had been caused by clay heave, which can occur when there has been significant rainfall.
They said the problem had now been fixed.
Rob added: “Let’s hope this doesn’t start a trend.
“Will the New Earswick snake spread to other bike paths round Britain?
“Will snake-spotting and sausage-watching become a niche pastime to rival Pokémon hunting?
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