Panthosette, I love the supermarket games you play. I'm trying to use my imagination to think of other useful situations in which this would apply.
I see it more as turning a switch on and off.
This is great. But the fact that you can turn it on and off delineates a difference. I suspect that this is the sort of NT behaviour that gets some of our fave aspies scratching their heads from time to time. I am just saying this in response to some discussion from earlier in the year, when someone said they didn't get NT behaviour and they found it fake. But you obviously know that it is important to keep well oiled wheels running smoothly.
My Max likes to impersonate animals. Usually meerkats as they have a distinctive body movement. It is usually in response to a difficult or unfamiliar situation, such as when he was having his tests for dx. When we went in for the results, the tester, who had not previously met him, had a concerned look on her face, as she thought he may be extremely dysfunctional. We had to reassure her that it was just for her benefit he did it and he didn't normally walk around on all fours sniffing furniture (and her!) and making noises.
Sometimes I will see him start to sniff the air in a very public way and I gently tell him not to do it. At home I let him get it out of his system.