I'm unlucky perhaps but have been in 3 emergency landings, including an engine fire, a hydraulic failure and a gear failure, as crew and a passenger. Have fought a toilet fire, been whacked on the shoulder by an unsecured canister, banged my head on the ceiling in turbulence and have dealt with various medical problems. (Today I was performing CPR in the terminal after returning from my holiday). I have had conversations and read reports submitted by cabin crew who have been in emergency and non-emergency situations. It happens, most cope with it at the time.
What you need to remember is that training methods and subjects comes from situations which have happened, and regulations exist or are introduced to avoid reoccurences of parts of the 'chain of events' (the core of all air accidents). If you have an emergency, it doesnt mean it will be catastrophic, or will end in fatality. You do your best on the day.