"You ceased to be useful," the white coated figure pointed out.

Then, without further preamble, Jack could hear a lever being thrown and a crash and would find himself hurtling downwards towards the pool of water.

A splash and he was submerged up to mid-torso, so he could not curl out of the blackness. It was just as dark within the water as the water had looked from without, making it impossible to see even if he did open his eyes.