Near Adairsville, the storm was powerful enough to flip cars, including one turned upside down onto its roof.

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We were in the air turning upside down, and when we landed roof-down it was like doing the crash in a nightmare.

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Patrick Deuchar, the hall's chief executive, says that the result will probably be the removal of the upside-down mushrooms that were hung from the roof in the 1960s, in an earlier effort to improve the hall's sound.

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He created an "upside down" three-story house with a garden on the roof, the main living space on the top floor and bedrooms and a studio for Mr. Turner's practice below.

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