[David's first impulse is to tell the calm controlled Anglo voice where to shove it but then the calm controlled Anglo voice knows his name and that at least makes him pause long enough to listen to the rest of John's explanations.]

I'm not trying to move his fucking heart, I'm informing him what is going to happen to it when we get out of here.

[It's also making him feel better in his general state of impotent rage, so.]

And who the hell are you? I know your voice.

[He's pretty sure he's come across it before but he's not paying that much attention to people he doesn't actively talk to.]