i don't remember the day or the meal, but we were in the middle of eating & Z tells us he's dreaming. he's fully awake, eating, talking, yet he says he's dreaming...that he's a cheetah.
we figured out why there's a constant stream of noise from Z. on the drive home, B told Z to do some toe excerises, count 1-2-3, stretch out that little toe. so he did that a few times, then B was tired of the counting so he told Z to count to himself. Z said he couldn't & there you have it - he has no internal dialogue, everything is spoken!