On a trip out to the US a few years ago, my mother was asked on boarding whether she would want to eat lunch on board.
To which she replied "Ooo fish" and wandered off to her seat leaving a rather bemused CC behind her
(My sister then informed her that they hadn't asked WHAT she wanted to eat and she got rather embarrassed. Scary thing was, she was only 50 or so and not deaf in the slightest
)