Yeah, to me he seems like he's got a lot of thoughts going on in his mind, and so there's always something making him hesitate to put out the next word. It's like when you're in deep thought about something and trying to explain it to someone at the same time, you end up with contention on the stdout and it looks weird.

A huge number of HN folks seem to have a stutter issue, maybe because they are also having a lot of thoughts while talking.

Interestingly another guy who interrupts his current thoughts is currently campaigning for re-election.