You know the sensation. You're at the beach, you wade ankle deep into the surf, the water rushes back into the sea and.... for a vertiginous moment...
... your senses tell you that the water is standing still and you are moving at high speed.

So began our journey.

Our current spacetime coordinates disintegrated out from under us. We found ourselves plunging toward the bottom of the sea. Luminous, gaily colored fish examined us calmly as we descended. Exhilarating pressure built up around us.