That wasn't exactly what he was expecting. Maybe he thought she'd tell him off, or tell him to mind his own business. He couldn't help but wonder if she was lost in her own little world. "Oh," was all he said for a moment, not knowing at all what else to say. He scratched his chin and looked her over for a minute.
"Um.. well sorry to have taken up your time." He went back to picking at his lunch. After all, he didn't have that much time out for lunch as it was.