The exact moment the trajectory of a situation has been determined.  

This is a situations’ “Flashpoint”.  

You find yourself alone in a dark room, in a chair, tied up.  Beaten.  To find out how and why, you must revisit the story to find the Flashpoint.

It started in your first year of College.  Was this the moment?  Joining College?  No, its more complex than that.  Let’s re-visit the story from that begining.