This is a natural phenomenon that anyone who does not want to see it, it causes too much damage. I recorded it after a hail in Vietnam
Hail is a phenomenon of rain in the form of particles or clumps of various shapes and sizes due to intense convection from thunderstorm clouds. The size can range from 5 mm to tens of centimeters, usually about a few centimeters in size, unbalanced in spherical form. The hail often falls with rain. Hail usually ends very quickly in 5-10 minutes, the longest for a rain track only 20 - 30 minutes.
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