Originally Posted by
muscat
The plane is screaming down towards the ground and about to crash. Would you rather :
A. hear lots of screaming and shouting
B. sit there watching the video with your noise cancelling headphones on, oblivious to your impending doom.
I assume you would realise something had happened after the plane had crashed into the ground, and you would then remove your headphones, before gracefully exiting your seat.

if you are watching the moving map and the altitude reading goes into negative figures - then you know you have crashed!