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This photo was taken when the photographer was about 14. He was hanging out a second floor window in order to get an unobstructed view of the sky. Monmouth, Illinois, 1984. Lightning is a flash of light in the sky caused by an electrical discharge between clouds or between a cloud and the Earth's surface. The flash heats the air and usually causes thunder. Lightning may appear as a jagged streak, as a bright sheet, or in rare cases, as a glowing red ball.
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