Both involve passengers to place their chairs upright again, forcing you to put whatever you’re doing aside.
If you have ever questioned why such a procedure is in place, it all has to do with safety.
According to Condé Nast Traveler, airplane seats play a major role in protection. Plane seats in their upright position are designed to withstand 16 times the force of gravity in an unlikely event!
When not upright, it is difficult to get into a sufficient brace position.
The upright position also plays an important role in allowing window and middle seat passengers to efficiently exit the aircraft.
Lastly, sitting upright can also help passengers identify more clearly what is happening outside the window.