It wasn't the lady on the flight calling it an o-ring, it was the writer. And there's no way you'd just happen to make up the word "o-ring" unless you were tryi

It wasn't the lady on the flight calling it an o-ring, it was the writer. And there's no way you'd just happen to make up the word "o-ring" unless you were trying to reference an existing term. You'd just call it a "ring" as the lady on the flight did.