"Oy, Hero," Jack said, reaching out a hand to grab hold of the Doctor's arm. "Stop the rushing. Together, remember?"

Maybe old habits died hard (and maybe in truth that's the way they should be) but that didn't mean Jack was going to allow the Doctor to be the one ahead and in danger.

"It'll be fine," he assured overly casually, "like I said, we'll just take a moment, chat with this thing."

He tilted his head upwards a little and nodded, speaking up, "Won't we. See, not trying to hurt anything."

He shrugged (well, as much as one can shrug while swimming). "Well maybe it's listening?"