He was on the run. Good. People getting nervous were people likely to make mistakes. With the turn away from anything personal, she keeps her cool and her cold judgment. She becomes more serious and some of the facetious, put-on cheer drops.
"Not in these quantities." Her comment is a reinforcement to Tseng's, a prompting.
He needs it to look cool.
"Not in these quantities." Her comment is a reinforcement to Tseng's, a prompting.