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Does anybody wonder what lightning looks like on the other end?

I've always wondered that myself. I also always wanted to know what happens to the ground that gets hit by a bolt of lighting.

My grandmom once told me that you sometimes find a small, deep hole...with a glassy hard black spherical pebble lying at the bottom.

Could it be that the dirt just gets molten from the heat of the lighting strike and turns into a small rock?