[ it's not that he's not interested in what's occurred to her, it's just that it's dawning on him that if he doesn't interrupt, he may never get around to his point. ]

What do you think the odds are that the gate might be emitting some kind of signature? Do you think you [ general you, the nerds ] can find it and figure out a way to detect it? It'd make finding the other gates a hell of a lot easier.