When it comes to travelling, there's a long list of things that could make you very unpopular with your fellow passengers.
Opening closed blinds. Asking to swap seats. Blasting TikToks for the whole cabin to hear.
And, of course, there's the never-ending debate over whether or not it's acceptable to recline your seat.
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One viral clip that's circulating social media shows a woman arguing with another passenger over just that.
It's unclear when the incident took place or with what airline, but the unnamed woman can be heard accusing the passenger seated behind her of pushing the back of her seat for the whole flight.
"The whole trip he pushed my seat. You've seen it. You know he did," she shouts.
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Meanwhile, the other passenger seems annoyed that she'd chosen to recline her seat.
The clip, which has since been reposted on X, has racked up thousands of views and sparked quite the debate on plane etiquette.
Many say that the woman had every right to put her seat back, a point she yells repeatedly at the other passenger.
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One person wrote: "I mean, if she wasn't allowed to put her seat back then why was the seat adjustable?"
"They add the recline seat button for a reason. It actually cost the airline extra money to provide this feature, it's meant to be used," another agreed.
However, not everyone was in agreement.
"Putting your seat back in coach is an unspoken thing most people don't do. It's really the airlines' fault because they've made coach so cramped and tight that putting the seat back shouldn't even be an option," one social media user wrote.
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“I do not recline because it undoubtedly intrudes on the other person's space. Being on a plane primarily sucks, a little consideration goes a long way," said another.
But, is it actually rude to recline your seat during a flight? Back in July, a former flight attendant weighed in on the topic.
Caroline Kneitz, believes reclining your seat is fine but there's a right way to do it.
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Kneitz, who worked as a flight attendant for Emirates for six years, said the rudest thing is when a passenger 'just reclines without looking to check who is sitting behind them’.
The ‘politest thing’ to do is to just ‘ask if they mind’ if they’re awake.
"Usually they will be fine with it,” she said.
She added: “I would advise to always wait until after the meal and drinks service.
“The last thing you want to do is abruptly recline and cause food and drink to spill all over the person behind you.
“Once service has stopped, look behind you and check that the person has finished eating and drinking and check if it's OK to recline.
"This tactic usually works like a charm.”