It was a nightmare at 30,000 feet.

A female passenger is being accused of a “pedi crime” after using her fellow flyer’s seat as a footrest on a Qatar Airways flight, as seen in an appalling video taking off online.

Fly-witnesses said the female passenger became perturbed after the traveler in front of her reclined her seat on the plane, which was headed from Doha to Moscow, East2West reported.

However, others claimed that the passenger, believed to be Russian, had been denied an upgrade and decided to protest by kicking her feet up.

The clip shows the woman resting her feet on the seat of the woman in front, who is forced to crouch down as she works on her laptop.

At one point, the mile-high hellion even claps her trainers together and uses them to shake the seat.

Fellow passengers and onboard employees repeatedly implored her to put her feet down, but to no avail.

“They tried to persuade her, tried and tried,” commented one observer. “They tried to persuade her to move her legs. She doesn’t want to, she wants to fly like this. People are going mad.”

Other passengers ridiculed the woman, with one quipping that they were in “discomfort class.”

“This is business class,” snarked one man, while a woman lamented, “This can only happen in Russia.”

The victim also weighed in on her in-flight plight, declaring, “As the saying goes, you can take a person out of the dirt, but the dirt doesn’t come out of the person.”

The clip concluded with an air hostess crouching down and explaining to the woman that she needed to remove her kicks from the seat.

She eventually relented and lowered her feet, the news outlet reported.

However, this is certainly not the first passenger to invade her neighbor’s space with their clompers.

A Singapore Airlines passenger proved even luxury carriers weren’t safe from pedi crimes after allegedly exposing his bare feet to fellow flyers — even touching his seatmate’s chair with them.