Jack plunged into the water, clearly missing all the rocks in his wake. It was like some sort of muscle memory, even now knowing what it was like to remember diving off this cliff.

And in the water it was quiet. Quiet until he heard a crack, and the water that surrounded him seemed to illuminate and flash. He emerged on the surface and shook his head, taking a deep breath and looking around.

"Doctor!", he called again before spotting him a short way off and immediately making to join him. He reached out, treading water with his feet, and grabbed him by the shoulders.

"You okay?" he asked immediately. "I've got you."

And then, after a breath, "Did you see that?"