Kirk: You're a police officer. I recognize the traditional accouterments.
Spock: You were saying you'll have no trouble explaining it.
Kirk: My friend is obviously Chinese. I see you've noticed the ears. They're actually easy to explain.
Spock: Perhaps the unfortunate accident I had as a child?
Kirk: The unfortunate accident he had as a child. He caught his head in a mechanical... rice picker. But fortunately, there was an American missionary living close by who was actually a, uh... skilled plastic surgeon in civilian life.