After beating Jason's mind's take of Alex and ignoring the fae Kirstie that kept bouncing back and forth on what to do, Jack kept silent. They were basically walking around inside his step-brother's head, there was a good chance they could do some permanent damage to him if they weren't careful.
When the group made their way into the city Jack had to admit that the way it was built was nice to look at; everything was symmetrical and lined up in a way that was damn near perfectly aligned, probably some kind of long, involved math formula was invovled that Jack would never understand but Jason could in about two seconds. It made sense a city in his mind would be mathematically perfect. Then the group met Geppetto and Martinio.
Jack just didn't get the reference Jason's mind was making and decided the less he tried to question it the better. Then they traveled through the large maze, at least Alex had been useful there; scouting routes under Jason's direction. Jack was sure that their efforts made the trip much shorter than it should have been. Then they were at the keep and met the Jasonized version of himself.
Jack just stared for a moment. Definately not how he'd thought someone would think of him but after considering his past arguements with Alex the tattooed teen was forced to admit that a person could see him in such a way.
Besides this was supposed to be Jason's subconscious mind, he didn't have any real control over it did he? Hard to tell with his superbrain.
When they found a pair of guards, who just happened to look like Vlad and Tat, Jack figured they were on the right track. And Jason laid out his plan, at least it didn't involve Jack having to fight with someone who looked like his awol best friend but he did have to put up with Alex.
Jack mentally sighed and readied himself for the sign for everyone to make their move.