Bobby Fischer & Emotional Control

I've either read or heard from a video somewhere (or maybe both) that Bobby Fischer was very sensitive when it came to discussion about his father.  If I remember correctly, after he was asked about his father, he would often have very little to say and be "different" the rest of the day.  I believe the person said Bobby was simply not the same afterwards (whatever that meant) and it took him at least the entire rest of the day to recover and deal with it. 

No doubt, this would have been an extremely and understandably sensitive topic for him, but does anyone know if Fischer had a more general emotional vulnerability/sensitivity/weakness in his disposition?  In other words, would other more general things bother him like this, where he was sort of thrown off kilter for a long period after encountering those things (and, if so, did it affect him in chess)?  Or, was this condition/reaction mostly related to his father?

Bob, I am your father. 

No! It can't be! Nooooooooo!