“I heard him, but I didn’t see him.”
“You heard him and didn’t see him?”
“No.”
“Why, he sprang right at my heels when I was half-way down the stairs.”
“Yes, I heard him, but there weren’t no dog there.”
“Don’t call me a liar.”
“I know what it was.”
“You do?”
“Yes.”
“Well, what was it?”