It's everything you've ever wanted to know about what goes on behind the scenes when you fly but have never dared to ask. Though perhaps you'll wish you never had...
We breathe the air from the engine
According to one anonymous pilot, the oxygen you breath on a plane is effectively pressurised air which comes from the engines. Around 25% of that air goes to the cockpit, whilst the rest is circulated around the cabin. Air leaves the plane via a small hole at the back of the fuselage.
You can unlock the toilets from the outside
You may have already seen a steward doing this. But one particular cabin crew member told Reddit that on many planes, you'll find a hidden mechanism behind the 'No Smoking' sign on the door. Just lift the flap and slide the lock to open.
Lights off to prepare you for an emergeny evacuation
When the pilot switches the lights off for landing, it's not to help you sleep. One steward revealed that when a plane lands at night, they dim the cabin lights in case you have to evacuate. Your eyes are already adjusted to the dark so you'll be able to see better once outside.
The pillows and blankets are not washed between each flight
As well as those, it's likely that your tray table is also harbouring a bunch of germs. One air hostess with over 20 years experience said she had never once seen the tables cleaned or disinfected when she worked at Southwest. Nevertheless, she claimed to have watched mums changing their babies before watching passengers later in the day eating from the very same table.
On board, the pilot is king
According to an English co-pilot, once the doors are closed the pilot has absolute power. He is authorised to place passengers under arrest, give out fines and even grant dying passengers their last wishes.