Sure! As an example, a friend asks "Do you want to grab a drink tonight?". My day is free, and it's morning when I receive the message. I reply "Sure! Where and when?". They don't reply.

I am now paralyzed for the rest of the day. My brain can't snap my schedule into place, so everything I do is a possible conflict with this promise I just made. Even if it's morning, something may happen -- another invitation to do something in the afternoon, maybe -- that I can't resolve because I don't have the necessary information to. This causes overwhelming anxiety.

My entire brain is blocked on resolving this ambiguity. I can't do hard tasks like programming. I can't pay enough attention to my favorite shows to watch them. If I do, I'll end up rewatching them later because I didn't retain anything. Reading a book is out of the question; I'll just end up rereading the same paragraph 20 times in a row then giving up.

The whole day, zapped out of existence.

To others I will appear distracted, hard to hold in conversation, irritable, and in a hurry. Internally, I'd equate it to the feeling you get on a once-in-a-lifetime special day, like your wedding day or a test that could decide your entire career. It's just that I get it from really small things, and all the time.