aaarggghhh!!! the same thing is driving me crazy - the endless, endless demands for full-on interaction when the genuine communication you are craving is like getting blood out of a stone (and at least the stone doesn't shout at you, hang on you, slap you or pull your hair).
I start off by trying to work out if there is something behind it he is trying to communicate (like playing charades!), then I try to link what he is saying/doing on to something a little less repetitive, then if that fails I just ignore the repetitions and try to give him a cuddle rocking him back and forward or swinging his arms if we are walking. He just wants sensory stimulation and a feeling of closeness to me, if he's too hyper and out of it to process language properly.
At other times it can be a way of avoiding talking if he knows I want to talk about something that makes him anxious (he is so much like a steretypical teenage boy in many ways!)
The worst of it is that ds is very into quizzes at the moment and keeps firing random contextless questions at me eg.
ds: "What is it?"
me: "What is what?"
ds: "Mummy, what is it?"
me: "ds, I don't know what "it" is. Can you give me a clue?
ds: "Yes"
me: "What's the clue?"
ds: "What is it?"
me: "no, the clue"
ds: (getting really angry now) "MUMMY I ASKED YOU WHAT IS IT??!!"
(sound of quiet sobbing and furtive chocolate snatching from kitchen)
There is one good thing that has come out of it though. Dd's language has come on in leaps and bounds and I'm sure it's because I
am so weepingly grateful for her emerging a)desire to communicate factual information b)comprehension of what she feels and why c)interest in past and future events d)lack of fussiness as to the exact wording of my reply e)basic comprehension of stories and events f)interest in finding solutions to problems
that I hang on her every sentence breathlessly as if tiny jewels were falling from her pre-schooler lips.
It's got to be encouraging for her, don't you think? 