Jinks wrote:
I think the experience is somewhat different for everyone so you will find that the descriptions vary somewhat. The severity can also vary a lot depending on what caused it, so it's not a "one-size-fits-all" thing - it might last for a few minutes or a few days.
I don't really get any "speeding train" sensation but I do feel overwhelmed - like I can no longer keep track of what's going on, and my brain responds by grinding to a halt. I liked the computer crashing analogy. In fact, I've used that before with people. With older computers, if you opened too many programs at once they would slow down and then, if the assault continued, they would freeze or stop. Autistic people's minds often do the same thing.
While in "shutdown mode" I find it very difficult to communicate - it takes me a long time to respond and I have to think really hard to get a response out (and it's usually a really lame response like "I don't know" because I can't think about whatever I'm being asked). I feel bewildered and foggy and need to go somewhere quiet and stare into space for a while to recover - my favourite place to go when I'm in that state is under a blanket where it's dark and quiet. If I can't retreat from the situation which caused it I become steadily more upset and unable to respond to things until I just have to escape or I'd probably break down and cry or something. Fortunately I've never been forced to that point, I just remove myself from whatever it is.
The usual cause of it is things like being stuck in conversation with many people at the same time, noisy environments, particularly when I'm also expected to do something like hold a conversation as well as cope with the environment, being expected to do multiple things at once (such as talk to someone, drive a car and find my way to somewhere) or having a lot of tasks to complete in a short amount of time, which overwhelms me. Shutdown tends to be gradual in my case, and the longer I am exposed to these things, the more shut down I become. As an example, I can manage about twenty minutes in a supermarket before I begin to shut down due to overwhelm from all the noise and people, and if I don't get out of there in time then I'll probably end up wandering around in there for hours, since I've completely gone AWOL and am just wandering around staring blankly at things and having trouble doing what I went in there to do.
I think "shutdown" is well defined as the opposite to or perhaps the introverted version of a "meltdown" - in a meltdown the person expresses outward actions like shouting or hitting in response to overwhelm and in a shutdown the person retreats completely inside themselves and becomes outwardly unresponsive. Some autistic people might experience both at different times or in response to different things.
i suppose thats similar to how i get sometimes, i generally just feel out of it, yeah that kind of foggy feeling, where as i would normally be quiet nervous i end up feeling indifferent to everything.