That description of dissociation sounds familiar...
I have read that shutdowns are more like reclusiveness, Finding some hiding place out of everything to load batteries. I do that when I get early warning signs, which might or might not be dissociation feelings. *)
I also understand that a shutdown is also losing ability to act (ie. one just stops and stands like not being able to know where to go, what to do), which is not exactly what happens to me, but close: I sit down and rest because I feel mentally exhausted, I start to stare at nothing and turn off my brains like I would be sleeping my eyes open. I don't remember anything (or at least much) from the episode. Dissociation preludes shutdown.
When it comes to dissociation episodes, more often I just have days when I don't feel specifically exhausted or overloaded or asocial but I still have these strange "something is not right" and "I can't get a grip of events around me" -feelings.
Social crashes that Outdated describes are usually not involved in either of phenomenons in my case. I am just angry and agitated and on the edge and eventually just exhausted afterwards. Arguments don't last long enough to cause me to go shutdown.
Actually, shutdowns are (luckily) so rare that I can't tell for sure what causes them and what happens to me during them. I am (again luckily) so resistant to stimuli that I don't dare to claim that I share same issues as most of you guys
.
*) Interesting side note: I drank my first energy drink ever some time ago. I almost immediately felt all warning signs: I began to smell things,
lights and especially contrasts began to disturb my eyes (edit: actually, on the second thought I don't think that happened, not in extraordinary degree), I had "I can't get a grip of events around me"-feeling, and I realized that I should not even try to think any complex puzzles. It went away in an hour. No more caffeine products to me... Does anyone else have same reactions?