What is the single loudest moment in a sports stadium, ever?

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Chicago Stadium

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1991 NHL All-Star game. Wayne Messmer sings the national anthem a few days after the Gulf War started. The place goes crazy.

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I think it was at Chicago Stadium, but not that one. During the 30's, there was a riot taking place in the stands, so the organist pressed all of the keys and instantly ended the riot. The thing was so loud that windows broke.