He sees the blood drain from her face and he reaches out to catch her, in case she feels faint. "Clara. Breathe."

So much like they had done when they came out of her Christmas Dream. "It'll be all right. Just Breathe."

He even takes a couple of exaggerated breaths, just to show how to do it.

"So, what you're saying is you're from my future."

He nods. This really isn't a big deal, it's not the first time it's happened to him. And won't be the last. But the way she hugged him...

"Please tell me now that I'm actually used to this face that I still have it."