When Jack pulled him for a hug, John hugged back, briefly but fiercely. He nodded as Jack held him, and blinked hard before talking.
"Yeah. I'm sorry. I jus'.. yeah. I just need some time to process. This whole regeneration business.. harder to work out than it looks."
He pulled away from Jack gently, but not before cupping Jack's cheek with his hand and drawing close, giving him a quick peck on the lips. "Come find me if you need me, okay sweetheart? I might be a bit prickly about that Master, but don't mean I won't be there for you. Any of you," he added, turning to include Romana.
He pushed away, and headed towards the door. He turned as he pushed the door open, and falshed a grin, "Be careful with him, okay, kids?"