A flight attendant has explained that you should never wear shorts when you're planning to travel on an aeroplane.
It came among a whole list of things that most of us have probably done on a plane without even realising.
The advice came on TikTok from flight attendant Tommy Cimato, who has made a name for himself on the app for going behind-the-scenes on things we didn't know about the flying machines.
He also shared the top five things he thinks we should all know about air travel etiquette - with some great advice.
He started: "Do not ever touch the flush button with your bare hands.
"It's honestly just super unsanitary and pretty gross so when you flush, use a napkin or tissue that's in the lavatory.
"Don't forget to drink water. Stay hydrated. You wanna have about 16oz for every flight you go on, so keep that in mind.
"Do not fall asleep or lean your head on the window. You are not the only that has done that and you don't know how many people or children have wiped their hands or other things all over the window.
"Don't or try not to wear shorts when you're on an aeroplane. It's the same thing as the window, you never know how clean it's gonna be, so if you have pants, you're gonna have less germs."
"Don't feel afraid to let a flight attendant know if you're feeling sick. So if you need food, water, or an air sickness bag, please feel free to let us know."
Following the viral video - which racked up more than one million views - one viewer joked: "Don't breath the air, it's recycled."
Another added: "Everyone laughed at me for wiping down my family's row before sat down - everything from the window, wall, trays, arm rests, back of chairs etc."
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