The real reason why flight attendants greet all passengers is not just because they love a good chat.
While the vast majority of us just presume they are being friendly, there is certainly a lot more to it than that.
This is very common procedure for all commercial aircrafts, but why is that?
Well, in a video uploaded earlier this year, a flight attendant explained why they scrutinise each passenger as they board the plane.
And just before we go on, it's not because they're critiquing your choice of travel attire.
No, in her vid, she explains that there are a number of reasons they stare intensely at passengers when they board.
And the majority of them are down to making sure we're all as safe as possible.
"Have you ever walked on a plane and saw the flight attendants standing right here greeting you?" Kamalani says in the clip. "Or the flight attendants walking up and down the aisle?
"Well I'm about to tell you what we're really doing.
"So, when you're walking on the airplane and you see our happy, smiling face - we're actually looking you up and down and we are trying to find our ABPs.
"And what that is called is our able body people or person - so, these are people who are going to help us in an emergency.
"For example, military personnel, firefighters, nurses, doctors.
"So, in case of an emergency, like a medical emergency or we are going to land the plane or there's a security breach, we know who is on our plane and who can help us.
"But, we're also looking for one more thing - beside from looking for things that don't belong on the plane, like a boxful of liquids - we're looking for human trafficking.
"It happens a lot in the industry and our passengers' safety is our number one priority."
So there you have it, turns out that they're just trying to keep you safe. So no need to go out and get yourself a new wardrobe.
Kamalani isn't the only flight attendant to let us in on the inner workings of air travel, though.
Speaking previously, a fellow member of the cabin crew community previously shared the very grim explanation of what happens if someone actually dies onboard - and this one isn't for the faint hearted.