The day the sky turned black in Leicester had the Mercury readers snapping away to capture the moment.
We asked if any of you had caught the image of the dark cloud that rolled over the city centre like a scene from the Hollywood movie Independence Day.
It seems it was not just Mercury photographer Alex Hannam who thought the striking phenomenon was worth recording.
We were inundated with photographs from readers from around the county who turned skyward at about 4pm on Monday.
Reader Melanie James switched to the camera mode of her mobile phone as the sky turned black.
Melanie, 36, of Highfields, took her image of the dark cloud as she visited her mother in Braunstone.
She said: "I was walking down Hallam Road at about 4.15pm when I realised just how dark it had become.
"At first I thought the sun had set but then I noticed that half the sky was blue and the rest back.
"It was really quite eerie. The photograph I took shows just how strange the sky looked."
Andrea Winkless, of Groby, took a picture on her phone out of her child's bedroom window after coming back from school.
The 44-year-old said: "I was just about to close the curtains to get ready for the evening when I looked up and saw this big black line right across the sky.
"It really was like the film Independence Day. It was a bit scary.
"I went out and brought the guinea pigs in from the garden because I expected a big downpour but no rain came. I have never seen anything quite like it."
Mercury weatherman Dave Mutton allayed fears of an alien invasion like the scene in Independence Day when a massive extra-terrestrial spacecraft blacks out the sky above Washington DC.
Dave explained that the striking phenomenon was caused by cold air meeting warm air.
He said: "It was very dramatic illustration of what happens when two different temperatures of air meet.
"Conditions like that can lead to the forming of mini-twisters and mini-tornados.
"The same conditions could be created again as we have the warm air during the late morning and afternoon meeting much colder air coming in later."
For more pictures of the dark cloud go to our website at www.leicestermercury.co.uk/pictures