Somewhere Tenenbaum starts laughing behind her hand and doesn't even know why.

Jack strides steadily through the water the same way he strides steadily across ground and through trees and, hell, probably the way he'd stride through raw sewage if he had to. Through the door is a landing that looks onto a lot of mysterious bubbling tubes; Jack takes a left and continues leading the way down. The walls here are built around jutting rock, or even hewn straight out of it, as if the earth itself is fighting the sea for mastery of Rapture.

This feels safer. This is more neutral ground, moving away from Central Control.