Tag for two people aligned parallel; one upside-down?

Useful Examples for awkward description:
post #791391
post #817669
post #818462
This is a common sort of thing, and I noticed it doesn't seem to be tagged. Or is it another case of the name being far too obscure for normal humans to know it? I didn't see anything in tag group:posture that looked too promising. I further note varying degrees of overlap and facing, but these differences are not relevant to the concept

What would it be called?

rotational symmetry is probably what you're looking for.

Yeah, that would be it. Never would have guessed that, but it does get the point across. Should it be added to some tag group so people have a shot at finding the blame thing?

It's really more of a composition thing than a posture thing and it is indeed listed in the composition tag group.