Read the following passage from The Outsiders and answer the question that follows:
“Darry had seen us from our porch and ran toward us,
suddenly skidding to a halt. Dally was there, too, swearing
under his breath, and turning away with a sick expression
on his face. I wondered about it vaguely. Dally had seen
people killed on the streets of New York's West Side. Why
did he look sick now?"
What does the use of the bolded word vaguely
suggest about Ponyboy's emotional state?