NEW YORK (CNN) — Should you ever find yourself flying in a crippled airliner with an open window at 30,000 feet, knowing how to operate your oxygen mask could be vital.
But many passengers aboard Southwest Airlines Flight 1380 on Tuesday appeared to be doing it wrong, social media posts show, despite instructions delivered for years by flight attendants before every takeoff.
Video taken during the flight and posted by Marty Martinez, for instance, shows passengers clearly weren't putting their noses inside the mask, even though that's a key part of the pre-flight tutorial.
Why's it a big deal? Well, there's less oxygen in the air above 10,000 feet. And without enough oxygen, people risk developing hypoxia. Symptoms include headaches, dizziness, tunnel vision and nausea.
Airline and hospital officials haven't said whether anyone experienced hypoxia when the flight — en route from New York to Dallas with 144 passengers and five crew members — lost pressurization after part of the Boeing 737-700's engine shot through a cabin window.
The masks deployed as the pressurized air rushed outside the jet. One woman died of injuries she suffered after she was nearly sucked out a window. Seven others were treated for minor injuries, though it's not clear whether any happened because the passengers wore their masks wrong.
Pre-flight mantra can get 'robotic'By now, you'd think the pre-flight safety briefing would be burned into our brains: "If necessary due to a sudden change in cabin pressure, an oxygen mask will drop from the panel above your seat. Reach up and pull the mask to your face. This action will start the flow of oxygen. Place the mask over both your mouth and nose and secure with the elastic band and breathe normally. If you are traveling with children, or are seated next to someone who needs assistance, place the mask on yourself first."
PEOPLE: Listen to your flight attendants! ALMOST EVERYONE in this photo from @SouthwestAir#SWA1380 today is wearing their mask WRONG. Put down the phone, stop with the selfies.. and LISTEN. **Cover your NOSE & MOUTH. #crewlife#psa#listen#travel#news#wn1380pic.twitter.com/4b14lZulGm— Bobby Laurie (@BobbyLaurie) April 17, 2018