:: action
"Yeah, sorta noticed that too. S'funny how many parallels exist in entirely different worlds. Far as I can tell, yours isn't even in the same string of parallel universes that mine is." She purses her lips, pondering that. "Wonder how hard it'd be for someone to jump the whole chain into another one."
She didn't say impossible, because she's learned in her time with the Doctor and without him that very little is actually impossible.