An explosion was captured by a driver with a dashboard mounted camera as he was cruising along a quiet stretch of motorway near Sverdlovsk in the mountainous Urals region of Russia.
The video, taken on November 14, shows a ball of orange light which rapidly expands to illuminate the entire road, turning the dead of night into the middle of the day for around ten seconds.
Expert opinion is divided on what actually caused the flash.
Youtube / Андрей Казанцев Strange but true: Mystery explosion in Russia lights up night sky
Viktor Grokovsky, a member of the meteorities committee of the Russian Academy of Sciences said the likely explanation was a huge meteor.
Others have speculated that it was simply an explosion at a chemical plant or a military operation.
Some have even suggested it could have been caused by a space rocket launch.
But local emergency services had no record of any incidents.
Eyewitness Miroslav Alexeeva told local radio: “”It was a dark night anyway so it really stood out, I had gone into my kitchen to get a glass of water when suddenly there was a bright light through all the windows.
“I was completely confused for a second, but when I looked out the window I saw the sky was alight with orange fire. I thought it was the end of the world or a nuclear bomb, but then it just went away.”
The Urals was hit by the massive Chelyabinsk meteorite in February 2013, when a huge explosion injured over a thousand people.
Via the Mirror