You´ll be amazed how fast you can start screwing things at a cockpit once you have an unknown emergency or even worst a known emergency that you have misunderst

You´ll be amazed how fast you can start screwing things at a cockpit once you have an unknown emergency or even worst a known emergency that you have misunderstood. Just deselecting the wrong button (for example disconnecting a generator and a cross tie connector), will put you in manual control, with all the cockpit lights and half the instruments off, several alarms ringing... not a desirable situation even for an experienced pilot. You are able to forget to communicate, to navigate, you are able to crash to a mountain because you are looking at a flashing light, I can´t find a good example outside of aviation to make you understand the feeling to look at a panel and not knowing what the hell is going on. At simulators we practice all the normal emergencies, that will cover you 99,5 of the times. Most emergencies are simple, but some times something that is not known even to Boeing happens. Or it´s a simple emergency but you take the wrong steps. This happens more frequently to pilots who passed a lacking instruction method (like the one I describe that´s happening at china), but can happen to anyone. The Air France crash was due to a no emergency situation (they just needed to keep altitude, and engine thrust selection to keep a normal flight and recover the instruments) that was converted in to a crash due to a misinterpretation and wrong piloting skills.