What I put it down to is the instinctive hormone reaction you get triggers that memory. My personal experience with people who have extensive mental health issues is they experience strong physical reactions to what most would think small events and they don't understand why they suddenly feel the way they do. It's crazy how these phobias develop so easily. From having no issue in the past I now find it hard, not impossible to just walk out onto a balcony over 10 stories up. I used to be able to do some crazy stuff well over 50 stories, but not now.

