Oxygen masks were 'inadvertently' deployed, and an emergency announcement played on a United flight — even though everything was fine

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• An automated announcement told United passengers to put on oxygen masks during a Transatlantic flight.
• A passenger on the flight told aviation news outlet Simple Flying that some people panicked.
• Cabin pressure was normal the whole time, a United spokesperson told Business Insider.

Dozens of United Airlines passengers started to panic when an automated emergency announcement told them to put on oxygen masks...