A female passenger was spotted drying her knickers beneath an overhead air vent while on a flight to Moscow.
The unnamed woman, who was flying from Antalya, Turkey, to the Russian capital, was filmed holding her underpants overhead during the flight, reports the Daily Mail.
Other passengers said she had not seemed embarrassed while drying her underwear on the Ural Airlines flight, and spent at least 20 minutes holding them up above her.
One eyewitness described how shocked passengers on the flight had remained silent after spotting her unusual behaviour.
The passenger, who wished to remain anonymous, commented: "Everybody was looking with interest and confusion, but everybody remained silent."