Jack stepped towards the Doctor but his face seemed less than convinced. "Really? We just... wait? Just stand here while the walls get smaller?"

With a look to his side he stepped away from a wall that seemed to be moving closer towards him, and stepped even closer to the Doctor.

"Hello," he smirked at him when he turned his head back, realising he was very much in his personal space. "You know Doctor, I hope you're right."