He is familiar with it. Maybe not just because he's grown to understand his partner's peculiarities, but because he's already turning to ask his own question.

"Want to go for a run?" Their words overlap, and Steve breaks into a grin. "It's a nice day to take in the Russian countryside."

He gets to his feet and holds out his hand to help her up. "Anything I should know about? Have you programmed in surprise aliens or ninja attacks?"

OK, that's because he's grown to understand his partner's peculiarities.