Jack knows that faraway look, and god damn is it depressing that anyone else can know what that's like. The best response he can give is to drain his drink and raise a hand for another one. He gives a sympathetic look and a respectful pause, but he knows better than to ask for details.

He will, however smirk at the usage of the word 'friend.' "Friend of yours?" Only one or two reasons somebody would decide to jump ship from their entire world to go to another one.

"I guess we can never know what's happening in someone else's world. Unless another metacrisis event happens, when you've already been through one." Jack scowls at his drink.