I am getting pretty good at being able to tell if my employee, Mark, is understanding what I'm saying. Sometimes he doesn't, and I'll have to ask him two or three times before he finally admits that he doesn't understand one of the words of the sentence. He thinks he gets it anyway, but usually it's one of the rather more important words.
And I can tell when he dismisses a throwaway sentence, knowing what I mean without knowing the meaning. And--I actually started doing it without thinking about it, and only realized it yesterday--I've started throwing in extra phrases when I know he's not understanding/listening.
For instance, yesterday. I was talking about how we're going out of town again on Monday. I said we'd get back on Wednesday, "and--" (in reference to preparing for/meeting with a potential landlord) "rock it out." I saw Mark's eyes glaze a little, and he glanced to the left. The sign. So I quickly added, "as the Pope would say."
And yeah. Not a flinch.
It happened too fast for me to have willingly, consciously done it. I really hope that it keeps happening, though. I'll let you know how it progresses.