While the Siberian city of Novosibirsk usually gets nice weather in the summer, beach goers had to run for cover when hailstones the size of golf-balls rained down on top of them on Saturday – despite enjoying good weather all day.

Apparently temperatures (which had been up in the 30s) dropped by 20 degrees during the freak hail storm – check out the video to see sunbathers run for their lives (it’s not that much of an exaggeration, those hailstones were big!).