What 3 words or phrases in one of i robot's chapters the book is used effectively in the context and how does it contribute to the chapter as a whole?

In the chapter titled "Little Lost Robot" in Isaac Asimov's "I, Robot," the phrase "get back, you fool" is used effectively to create tension and urgency as the characters try to catch a rogue robot. This phrase contributes to the chapter by highlighting the danger of the situation and emphasizing the need for quick action to prevent harm.