Reverse Stuttering

So the other thing that Vidar is doing a lot which is interesting from a phonological perspective, is what I call Reverse Stuttering.
I gather that actual stuttering is a tie-up in the motor planning part of speech production, so the speaker repeats the first segment or syllable. Vidar seems to be more of a speak-before-you-think-too-much-about-it kind of child.  Sometimes he even gets going and I can tell he doesn't know what he is going to say he just wants to keep the conversation going. However, he gets to the end of the sentence, and before going on to the next utterance he repeats the last segment as a kind of `filler'  or uhm or ahm before he continues.
Like this:
Mummy when we get home m m m, can I play with the ipad?
The coda segment can be anything, even things that you wouldn't think would be pronounceable on their own like `ng' and `ks' .
He seems to do it in all his languages. I can't tell whether he is rethinking his previous utterance, or just doing some kind of perseveration as a filler strategy. Weird.
I am writing all of these things down now so because I think the next 6 months will bring some big changes and I don't want to forget.