Have you ever had a friend show you a picture or video from your past that brings back vivid reminiscences that you’ve simply forgotten? Maybe it showed some forgotten insights into your life that indicated where you were at that point in time.In watching the new Beatles documentary ‘Get Back’ (available on Disney+), I was absolutely fascinated to peek behind the curtain to see what these four idols were really like. For me, a student of human behavior, it wasn’t just about the creative process in the studio (which was …