A witness has captured footage of what is thought to be a rare case of ball lightning on his smartphone.
The glowing sphere showed up above a field near Novosibirsk, Siberia's largest city, before slowly moving through the air and disappearing behind some nearby trees.
The phenomenon was filmed by Roman Tregubov, a graduate of the Novosibirsk State Technical University, who can be heard referring to the spectacle as "fireball lightning" in Russian.
"It's the first time I see one in my life," he said as he continued to film the orb. "It's going to move away. Lost it. Where it is? There is it. I wonder if it'll blow off soon. Yep, it blew off."
Ball lightning is an incredibly rare natural phenomenon which typically manifests as a glowing orb.
This appears to be one of only a few known examples of it ever captured on film.
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