These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Also worth mentioning: "Ohhh, you've torn your coat."
Susan imitating a speaking clock over the phone to annoy David as he talks to his fiance. A house guest arrives, checks his watch, and corrects her as she's doing it.
Esoteric Happy Ending: David loses his fiance (though they weren't marrying for love anyway), and his dinosaur skeleton (whether it's irreparable is unclear). However, he gets Susan, who he is at least very fond of at this point, and his museum does get the funding it requires.
Vindicated by History: The film was a flop in its first release, to the point where Katharine Hepburn had to buy out her contract to RKO and Howard Hawks was fired from Gunga Din. Nowadays, it's regarded as a classic.