Rory was encouraged by the smile; it made his heart flutter strangely as he listened to Mari's explanation. His brow furrowed a little as she spoke. So Mari didn't know what was causing this either, from the sounds of it. Still, it couldn't hurt to ask. "Do you have any idea why this is going on?" he asked gently, although he was pretty sure he knew the answer.
He paused for a moment, then hesitantly asked, "a-and... what else have you done? You don't have to tell me I just... if two impossible things are suddenly possible, I'd kind of like to know which laws of the universe are still intact." It wasn't the best joke, but Rory's default reaction in uncomfortable situations (after evasiveness) was usually humor.