Interesting post!
My emotions have always been...weird. Aside from crying while being berated/punished/failing at something, I don't remember crying much outside of having extreme bouts of depressed moods and self-pity. I would have these phases about 1-2 times a year where for a few days I would just be an emotional wreck (this began when I was around 9-10). I would even think about suicide during these times; I'm not sure chemically what was going on to make me hit that kind of a low, because once it was over, it was...over! And because I found this process so unpleasant, I began as a teenager to slowly reject the emotion of sadness to the point that I now have difficulty crying even when I really want to or need to (still happens sometimes, usually in a really intense moment unfortunately). I've messed myself up a bit it seems
BUT, I did actually throw 'fits' similar to what you're describing. Recently I had someone point out that maybe inexplicable crying, or throwing a fit over something seemingly small or childish was the result of being overwhelmed and at my limit, sensory-wise. Mini story: I was young here, 7, but old enough to know even at the time that this was inappropriate - I received a gift at a school gift exchange and was so disappointed by what I got that I started crying a lot and throwing a fit. It was really embarrassing, even at the time, because I wasn't typically known for bratty behavior like that. Another girl actually gave me her gift, haha, an alarm clock which I used for years. Anyhow, I still don't quite know where it came from. And I have gotten to the point of tears even in my 20s over small things like my brother snapping at me for being too impatient for a meal. I don't know...it takes me back to the point of the whole 'at my limit' thing. That maybe those of us on the spectrum, dealing with everyday things that are harder for us or cause more stress, leads to something small or 'childish' pushing us past our breaking point? Only speculating.