"You seen a girl around here?" he demanded angrily.
George said coldly. "'Bout half an hour ago maybe."
"Well what the hell was she doin'?"
George stood still, watching the angry little man. He said insultingly, "She said- she was lookin' for you."
Curley seemed really to see George for the first time. His eyes flashed over George, took in his height, measured his reach, looked at his trim middle. "Well, which way'd she go?" he demanded at last.
When Curley is looking for his wife, he has a brief conversation with George about where she went. Something else happens during this moment. What explains Curley's reaction to George in the above excerpt?