When I am really really angry, I react very similarly as Deina is reacting. I am considered the "strong one" in my family, which was very "dysfunctional" when I was young. As the oldest child, many times I had to step up to the plate and be the adult in situations. This offered me no chance to whine and cry during frequent crisis' that arose in my surroundings.
As a result, when there is a crisis, I tend to be very outspoken and can express myself easily. When I offer myself that moment to reflect on my emotions, I can crack, but quickly my "strength" will grab me again. How I feel is VERY similar to what Deina is showing - so much so that I can "feel her pain".
A person who reacts with my personality style falls apart...oh yes we do. But we do it in the quiet stillness of our self-proclaimed hiding places. We do not fall apart in public. And we don't need meds to be like this either.
Hope this helps with understanding.