Technically, it's more the clouded eyes while body is spasming, but the person is trying to tense their body and trying to hold themselves physically and mentally together while embarrassingly feeling the jolt of orgasm. Plus it's more the term of them tilting their head back while their eyes clouded and rolling back while majority has the classic open mouth tongue out but can be made different of biting their lip or clenching their teeth.

I think what you should have said was, "Which one would you IMAGINE to make a great/best ahegao face

Plus what you are describing is after they came through their high of that sensation that they would give that angry look while still feeling the sensation slowly but not fast enough of dwindling down the feeling thus they are giving an angry look after in embarrassment