I often replay conversations that have upset me out loud. If my mind is still turning over something irritating, that comes out as mutters too. I do it when I’m walking along the street, too. Get lots and lots of “Are you nuts??” looks.
I always do this. I don’t care if other people hear. I like to talk to myself. I also often talk to my computer.
You’re lucky, my computer is an arrogant bastard but the fridge is nice.
I do this too. Sometimes I’m muttering about something that happened in what I’m reading/watching/playing/etc. but I also just think out loud about almost anything that pops in my head, whether or not I’m alone…
I do this especially when reading something that is in Spanish, or otherwise hard to understand. Or when solving some kind of puzzle or problem, like a freecell game. Also, if I’m walking somewhere then instantly realize I’m going the wrong way, I have to say “No wait… I guess I do want to stay there” just in case someone sees me and wonders what I’m doing.