Okay so one of the consistent fandom jokes we have is that John likes to bottle up/can’t deal with his emotions. But at the end of the credits, John is alone with his thoughts and I can’t help but think that those bottles begin to break open and leak out, flooding him with ideas and emotions he’s never fully dealt with before. He’s an adult now, not a kid, so obviously he thinks differently than before. And the worst part is that he doesn’t have anyone to really vent all of this to, at least without troubling them. Maybe all of these emotions lead to anger and frustration that cause him to be reckless and that’s when they travel to Caliborn’s Masterpiece.