The water below is dark, deep, blue-black. There could be endless fathoms down there, out beyond the turtle's edge. Endless fathoms downward and no way up.

And he's about to go in. Lapis' arms tighten their hold as they hurl downward, kniving into the water.

The cold alone is probably enough to be a shock to the system -- followed by the immediate pressure pushing, squeezing from all directions, the inability to even draw a breath from startlement.

Fortunately the discomfort will only last a moment. Lapis forms a bubble around them both, sealing air around them and the water out. The bubble heaves and churns for several seconds in the current until the water re-settles from its interruption, then bobs softly underneath the surface, away from Chihuelan interference.