Welcome Aboard
If you've ever stepped foot on an airplane to travel somewhere, you've noticed how polite and well put together the cabin crew is as you board. Have you noticed their hands are ALWAYS behind their backs?
What's Back There?
Well there's actually something they're holding back there...and no it's not a taser in case of terrorists.
How Many Passengers?
The cabin crew are in charge of counting every passenger that boards the plane, and generally takes place once you've sat in your seat.
The Counter
But for the times they don't count while walking down your aisle, it's because they've used a counter as you walk on board. Clever right?