What happened when the seventh vial of God's wrath was poured out (Rev 16)?

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The islands and mountains ran away, and 33-kilogram hailstones fell on people

(A talent was equal to about 33 kilograms)

the seventh angel poured out his vial ... And every island fled away, and the mountains were not found.

And there fell upon men a great hail out of heaven, every stone about the weight of a talent. Revelation 16:17-21