The woman, who was wearing a cream jumper, blue jeans and a holiday-appropriate hat, decided to use her airtime to have an impromptu workout.
In the bizarre footage, she can be seen casually squatting in the galley.
But little did she know, she was showing off her black thong with every dip.
The scenario was so weird, one passenger reached for their phone to record the woman's routine.
The video has been viewed more than 318,000 times since being shared by popular page Passenger Shaming on Instagram.
Unsurprisingly, online viewers had some pretty strong feelings about this womans high altitude workout.
One person wrote: “Is anyone in those seats she's hanging off of? My pet peeve, the seat shaker.”
Another disgruntled viewer commented: “Oh Gosh! I hope I never have to see that!”
But some people praised the womans viral workout, pointing out the importance of stretching on flights.
One well-informed viewer commented: “Can see making fun of the thong, but stretching while flying can actually help prevent deep vein thrombosis (blood clots). Just saying.
“Technically everyone should be doing this.”
Another wrote: “Almost perfect form. A little more weight in the heels and that would be perfection.”
A third fitness-fanatic commented: “Ya do what you gotta do, but just cover up, people."
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