Russell's mid-step away when Sam asks the question, and he misses the hard look... but his spine stiffens at just that one word, in a way that indicates yes, he recognizes it. He steps forward once or twice more, leans against the side of the nearest building, and stares blankly at Sam.

"You... Weren't you just saying it's because you're old? God, I didn't think... Have we talked before?" Because now that he's thinking on it, that's a familiar voice, like he's heard it talking. Maybe not to him, but in one of the older exchanges he's listened to since.