Where he's obviously been talking to himself in his head. Then he continues this conversation out loud, expecting me to know what he's talking about. And I'm clueless.
I just told him that it irritates me enough that I want to punch him in the ear. I said "I can't hear what you're thinking, so the next time you've got something going on in your head..." and he finished the thought "keep it in my head".
Damn straight.