He picked up the difference, and his lips might have quirked a little bit in pride at having drawn some other tone out. It was a bit like when he got Spock to express something other than his usual stoic expression. Little victories here and there to be enjoyed.

"If you don't mind me keeping you in my back pocket to help out with wounds to keep them from getting infected or getting sick, that's enough," he assured him. "Which means I might be calling on you a lot. Trouble seems to follow us when we go on missions in one way or another."