30 Flight Crews Reveal The Darkest Secrets of Flying

Oxygen Masks

Has the flight attendants or pilots ever told you that the oxygen that comes out of the masks, when needed, only lasts about 15-20 minutes if there's a full flight? If you're too high, you only have about 20 seconds before actually passing out. This is kind of scary, what if you're in a bad situation and you can't get to it in 20 seconds? The entire plane passes out? Whoa.

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