More than one of the above. Thinking becomes difficult, I may become semi-nonverbal, but most of all I completely lose any capacity for tact and nonverbal expression, even to the extent that people ask what's wrong. I guess my face goes blank. I may say something offensive because there's nothing else to say or no other way to say it. I can't ask for help in this state so my only option is to leave.
Things that have made me feel overwhelmed lately:
Going to the library or any other place I've never been or have not been in a long time. I no longer know exactly where stuff is, and lack a sense of belonging. I need to leave and go back a few more times on a few more days before I can get anything done.
Encountering unexpected obstacles in getting something simple done, and thinking "If this were a book I could just read the damn thing!" I'm unable to ask for help that day. I may yet return to finish this particular task. Then again, maybe not. Aw, screw it.
Handling a large number of parts at Home Depot while trying to figure out how to build a flame reactor. Not being able to re-shelve parts quickly is the last straw. I must take what I have, leave, and get something to eat.
High school reunion: Loud music, bright lights, mostly friendly people (I think) I haven't seen in years. I'm not adjusted for this environment. People are misunderstanding me and reading the wrong things into what I say and do. My face is blank and I say little. People ask me if I'm OK. I realize after the fact that my tone might have been a bit off when I explain that about 200000 helium balloons = 1 ton. I'm a bit different when talking about something sciency. Confident, but maybe a bit strident. Maybe I like being like that a little bit. When I leave, I am apparently invited to an afterparty, but have trouble finding the place. Not sure the invitation was genuine. I give a guy a ride back to his hometown and he makes outrageous claims about what we'll do when we get there. I am relieved when I am finally alone again and on my way back home.
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A boy and his dog can go walking
A boy and his dog sometimes talk to each other
A boy and a dog can be happy sitting down in the woods on a log
But a dog knows his boy can go wrong