[A very puzzled/surprised look overtakes the Doctor's face] Ohhhh, you don't have to tell me how time works--and that's the slow way of doing things, by the way. But here! I can leave my world mere seconds before an explosion, stay here for months--maybe even years--and still go back to that exact moment! How come that isn't the same for you? Why isn't it?

[The second question is softer, asked to himself rather than to Jacob. (And unfortunately, he doesn't share any sympathies over the loss of profit from tourists since he's kinda tuning that part out...)]