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Important-Courage890 t1_itper17 wrote

Air pressure changes due to HVAC/doors opening-

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cocainebiscuit OP t1_itvr6ty wrote

I don’t feel like this would be the case as the suction would inherently affect all of the ceiling tiles - they were smaller tiles and I watched a single one lift up and then slowly get put back into place. If it were the HVAC it would have fallen at normal speed rather than slowly going back into place imo

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