How does Mildred Taylor word choice and punctuation in the passage support the urgent and tense mood of the moment? Use specific details from the quote in your answer.

“Oh, Lord,” Mama groaned. “Stacey, get Mr. Morrison. Quick now!” As Stacey sped from the room, Mama’s eyes darted to the shotgun over the bed, and she edged between it and Uncle Hammer. Uncle Hammer was watching her and he said, quietly, “Don’t worry. I ain’t gotta use David’s gun… I got my own.”