If you've ever gotten on a plane, you may have wondered what might happen if it crashed in a remote location and you had to survive.
But for one unfortunate group of passengers, this theoretical scenario became a nightmarish reality.
This is of course the infamous plane crash in the Andes in 1972 on the Uruguayan Flight to Santiago, Chile, where survivors of the crash had to resort to cannibalism to survive.
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You might think that having to eat your dead friend to stay alive would be the worst part of such an ordeal, but according to one of the survivors you would be wrong.
Roberto Canessa was one of the 45 people who were on board the ill-fated flight when it crashed in the Andes.
Of the 45 people on board, 16 survived and were forced to eat the dead passengers, surviving for 72 hellish nights.
But Roberto has revealed a part of the ordeal which was somehow worse than eating human flesh.
He told Good Morning Britain: "The people that look at this story from outside think that eating our dead friends was the worst part.
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"But the worst part was the avalanche. I was buried alive for five or six minutes thinking I was dying. We were buried there for four days."
The survivor continued: "So there’s a succession of events that happened that made the stories so intriguing, and led people to ask, 'how did you do that?'
"Well, 19-year-old rugby players, university students, all these components were very important for us to build a different society.
"There were no amicable forces, from being a rugby player to a mountain man, we didn’t even have snow in Uruguay."
The revelation came ahead of a Netflix dramatisation of the ordeal called Society of the Snow which which tells the remarkable story of the survivors.
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Director J.A. Bayona said: "We did extensive interviews with the survivors, so all these details were taken from that. The black urine is something that starts when the body starts to consume the organs, not the fat.
"So it’s actually quite ironic because they [initially] decided not to use the bodies and in that moment, they were consuming their own bodies."
Society of the Snow is now streaming on Netflix.
Topics: News, World News