Here's a question and a few possible answers:   Q: John couldn't smile. He wasn't sad,  he didn't have the muscles for it anymore.   But he made the kids happy by standing on his head when he did what? Possible A: make jokes, frown, make others happy too, cry, rainbow  Why is "frown" an answer aligned with human common sense?
The answer to this question is:
john couldn't smile. he wasn't sad, frown.