I was wondering if other SJs run into something similar. For as long as I can remember, if I can manage to get relaxed into proper introversion while doing something, I start repeating random things in my head over and over again. I'll repeat entire lines from an entire scene in a movie, sing lyrics to almost entire songs, think about lines from a book I might've recently read, or anything that was interesting enough for it to stick in my head.
It's the kind of thing that's energizing to me in the middle of something taxing. It's just my way of retreating back to the familiar. Do you guys do that or notice it?