He catches the blank expression. Oh yeah. He forgets about that sometimes. He takes a few moments to mentally translate what he'd said from Engineer back to English. "Basically it's a power generator," he clarifies. A fleeting grin passes over his face. "Yeah, I know it's on the small side. Size isn't everything. This baby could power a city." Of course after that, her next question is an obvious one. He did more or less see it coming even if he had been holding out some foolishly optimistic hope that she might not ask.

Now normally this isn't the sort of thing he'd just tell someone. Especially not someone who is effectively a complete stranger. But for some reason it's easier to get the words out this time; maybe it's because it's something he feels like she's supposed to know. And maybe the truth is a little thing when he's already letting her this close, leaving himself this exposed. There's something strangely reassuring about the firm, warm touch against his stomach.

In the end he just shrugs and gives the bare bones of the explanation. "It's powering a magnet," he says, tapping his chest. "I've got shrapnel headed into my heart. Inoperable. This keeps it where it can't do any more damage."