You'll get used to that in time, Jim. It's part of hanging out with Natasha. Never quite being sure when she's joking or when she's threatening. They often have the same voice. He should introduce her to Uhura sometime and see if she can tell the difference.

"Good, yes. Now all we need..." She glances up at Jim out of the corner of her eye. "We need to get you some underwear. If you wear all of this and then your regulation boxer briefs I will find you."