A pilot has lifted the lid on one of the secret spots in a plane which only the crew get to use, and the secret staircase that leads to it.
It's no surprise that there are all sorts of hidden nooks and crannies in planes, with key equipment stored in all sorts of places and sometimes right behind the seats of some passengers.
With that in mind, there are also special crew-only sections of a plane which passengers can't just let themselves into, but now we don't need to because a pilot has been kind enough to give us a guided tour.
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Steve Giordano took to Twitter to show off some of the crew areas of a Boeing 787-9 Dreamliner, leading us through the crew rest area, before opening a door which leads to a secret staircase.
Taking us up the stairs, Steve reveals the passenger plane has a couple of beds set up for crew members to sleep, as well as an extra seat, which is somewhat confusingly positioned where the occupant could stare directly at whomever is sleeping in the beds.
People were fascinated to make this discovery, with one previous plane passenger feeling vindicated after 'losing my marbles hearing footsteps above me'.
Someone else said it looked like a 'pretty comfy spot' while a third was glad to get this tour as this part of the plane 'isn't even something you can politely ask to see'.
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Plenty were interested in taking a nap up there, and it'd certainly be more comfortable that trying to doze off in your seat.
Others said they'd slept in similar conditions and said it was a 'cozy' spot where they'd managed to get a '100 percent sleep record' and described it as 'like being back in the womb'.
Not everyone was a fan of the place, as one person said it looked 'claustrophobic' and another wasn't convinced they'd enjoy sleeping right next to someone else 'with just a curtain between us'.
There are other secret aspects about planes which other pilots have revealed, including the mystery of where all your poo goes when you've flushed it down the toilet.
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Your faeces doesn't actually get flushed directly out of the plane and directly onto whatever the aircraft might be flying over, that's just an urban myth.
Instead it's plumbed through to the back of the aircraft and gets removed by the ground crew once the plane has touched down at its destination.
Meanwhile, on some planes there's a strange red strap over the window on the doors, and this is to let the fire brigade know if the inflatable slide is on or not, since if there's an emergency you don't want the responders to be crushed by a giant inflatable slide.
Joe Harker