[At first, Nick thinks Rey might be coughing; outright mirth is certainly something he doesn't expect from Rey, not even in light of his accidental, but amusing rescue. But no, that's definitely a sound that's familiar, and yet unfamiliar all at once: Rey is laughing.

And for a moment, it's contagious, and he finds himself laughing too.]

I think the Institute really missed an opportunity by not making that a feature in their synths. Their reputation as the 'Commonwealth boogeyman' would be very different if that was their regular strategy for getting what they want. Clients coming in my door, telling me they think a loved one has been replaced. And how do they know? They heard them beeping in the night.

[He shakes his head, smiling harder than he has in some time. The thought of being replaced by a synth is nightmarish, and an absolutely reasonable fear in the Commonwealth, but the thought of them pretending to be loaded with explosives in the most painfully phony way is something even he can't help but laugh at.]