"No," the Doctor said. "This is good. No. No, wait, it's not good. Not good at all. Jack, can you please stand still for a moment?"

He took a step forward and put his hands on Jack's shoulders. Jack kept moving, his body shifting and swirling in ways he knew couldn't possibly be happening.

Maybe Jack was just a figment of his imagination? Maybe he was still dreaming, but Jack needed to stay still. It was terribly distracting.