Non-Standard Behavior And Non-Standard Events - Behavioral Change

All the while I have thought that each person expresses a behavior that is largely static. And the behavior of course is different for each person with some degree of overlap.

Now I am focusing on the behavior that a person exhibits that is very different from their normal behavior. 

Examples:

1. Neerja Bhanot Airhostess during the PAN AM hijacking. 
2. Akshay Kumar in Airlift in Kuwait. 
3. Me in the two train episodes
4. A normally rational and very calm friend once chased another person with a cricket bat with intention to do bodily harm. What the other person did to provoke this behavior in my friend is a different story. 

All of these are non-standard behavior (NSB for short). By NSB I refer to events which happen only once (or twice) in a person's life. People who knew the person will find it very difficult to believe that the person exhibited such NSB.  

Now the question is: 

What caused these NSB?

How do we predictably make this NSB happen in a person? How do we increase the percentage of desirable NSB in a person? 

As I understand,  an NSB is triggered by non-standard events (NSE) in a person's life. Does a specific circumstance create the same NSB in everyone? Answer is No. 

Which NSE creates a particular NSB in a person is the question I am trying to answer. 

A new NSE creates a focus in a person, causes their brain cells to align metaphorically and hence enables a NSB. Why should the NSE create a focus?

Additional reading:

1. https://en.m.wikipedia.org/wiki/Normality_(behavior)