First. Klaus shows no reaction, but it's a mix of conflicting feelings and thoughts inside him, because he doesn't want her to go too fast, either, and besides, this bloody station does not make for ideal circumstances to learn all this.

He gestures in the direction the man is gone, and she falls into stride beside him. "You'll need to go for the carotid artery," he tells her, and easily finds the place on his own neck, to show her, near the bottom of the neck. "Here. Any higher up and it splits into two, you'll get less blood flow. Obviously," he adds, although he doesn't think he needs to, "best to take our man by surprise."

As long as the nanites had their way, in any case.