We can't. [and then quickly, before he can panic more] But time doesn't pass here, or so we've been told. When the Mansion decides to send you back, you'll be right when and where in the place you just left.

[He says it with careful neutrality; neither he or anyone else from his world particularly wants to go back, regardless of time or place, but that's only because almost all of them are here. The frantic worry for Aoko is something he's very familiar with, in any case, and Conan solemnly throws on his safety and holsters his gun, venturing a bit closer]

Come on, Kaito-niichan. You need some bandages.