There isn't much context to this video. Two storm chasers, Brandon Ivey and Sean Casey, got hit by a tornado in their armored Tornado Intercept Vehicle 2, which is designed to be hit by tornadoes.
Simply, this is what it looks and sounds like inside a twister. For me, there's also something about the alien movement of the rain on the windshield that's almost scarier than the effects of the swirling wind.
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