It becomes very clear that the one thing she or they both need to do is calm down, take a step back and think about it logically. Not necessarily in that order. Between the two of them, he has a better chance of that as whatever it is she is feeling, he isn't feeling anything extraordinary. He allows her to move his heart over her chest where her heart would (does) beat. He goes quiet for a moment to allow nothing else to interrupt the truth of the matter in coming to light. One thing it confirms is that her heart is in fact beating. His mouth opens. "This is what I'd expect from a body that was alive...

Take your time. Do you feel anyother symptoms?" Calm and collectively, as he can be in the the moment, asked.