If you happened to look outside your window in Manchester last night, you'd have been in for a pretty special sight.
Scores of Mancunians captured incredible scenes as the region was hit by a phenomenon known as 'silent' or 'heat' lightning.
Social media was full of spectacular videos which showed the skies above lit up by purple lightning.
But unlike a normal thunderstorm, the weather display was without two key elements - thunder and rain.
Heat lighting, also known as silent or dry lightning, usually occurs in the American Southwest.
The phenomenon sees cloud to ground lightning that has occurred very far away, with thunder dissipating before it reaches the observer.
Many people chose to stay up to watch what one woman described as "the weirdest storm" she had ever seen.
Daniel Walker captured several pink flashes of the lightning from his bedroom window on Monday night.
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"In Manchester and you can hear nothing. It is the end of the world as we know it," he tweeted.
"Creepy yet beautiful lightning."
Meera Saravan tweeted an impressive video of the lightning over Manchester on Monday night.
"This lightning definitely woke me up," she said.
One baffled Mancunian wrote: "Can anyone explain what causes a storm like this? Lasted 30 minutes, was non stop lightning with no thunder... silent."
Another wrote: "Best storm in living memory. 90 minutes silent lightning show and now, my god Mother Nature is p*****.
"Beginning to wonder if Armageddon is a thing after all."
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Jessica Louise captured the storm from her house in Bolton.
"Beautiful silent lightning seen in Manchester coming from Bolton, weirdest storm I've ever seen," she wrote.
People said the storm didn't stay silent for long, with thunderstorms and rain battering the region in the early hours of this morning.
Greater Manchester is braced for more humid weather today (Tuesday) with a yellow warning of thunderstorms still in place.
The warning stretches across the whole of the country, and is expected to last until Thursday.
Temperatures could rise to the late twenties during the day, but outbreaks of heavy rain and storms could come at any minute.