If they had been walking and talking, Reynir might have earned a more visible reaction. Jacob might have stopped and looked at him like he was crazy but... they aren't walking and talking.

Neither is it such a strange question, if the universe has bounced you around before. He only knows of one person who doesn't come from Earth, but perhaps that's enough.

"Jacob. If you use my full name I think you're about to arrest me." Or sentence him. Neither are good. "I am from Earth. I don't know how much that's actually worth, by itself. Maybe when is just as valid."