As it turned out, it was Jon's friend Tim Brant who had called him. And for Jon, that was fortunate, because their personalities/lifestyles weren't really all that different. So not really much changed for Jon. Unless, of course, there was something about Tim's life that Jon was unaware of.
Sighing a breath of relief at seeing that he didn't seem any different, Jon headed downstairs to see how his family had changed. Judging by the family portrait, though, he figured that it had changed a lot.