How does Lee incorporate local humor or “inside jokes” into the setting of To Kill A Mockingbird?

Which two sentences in this excerpt from theodore dreiser my brother paul are examples of characterization that suggest paul is a superstitious person?

Aman lives on the twelfth floor of an apartment building. every morning he takes the elevator down to the lobby and leaves the building. in the evening, he gets into the elevator, and, if there is someone else in the elevator -- or if it was raining that day -- he goes back to his floor directly. otherwise, he goes to the tenth floor and walks up two flights of stairs to his apartment.

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