Is this an aspie trait?
I do this.
I also do this when playing video games (or at least shift positions) and prefer jobs that I can pace at.
When I'm engaged with something, I move a lot, rub more forefingers against my thumbs, flap my hands, chew on my shirt collar (generally on the computer alone -- never CAUGHT myself doing this one in front of people though I may have in class or at lectures), tap my fingers, shift my weight, tap a foot.
I tend to think through things in a dialogue with myself and move my hands as though talking.
When I was younger, I walked on the tips of my toes.
I suppose these could be stimming.
I'm undiagnosed, FYI.