Common flush toilets, with a water storage at the bottom matched with an S or U-shaped trap below, effectively prevent the escape of foul odors.
However, the toilet in the solitary cell of the Narrative Cage does not store water at the bottom; it has been replaced by a metal filter and a device similar to a vacuum pump.
Given Gray Rain's character, she probably couldn't stoop to liquefying her limbs, reaching into the toilet to fish out coins—her bottom line is still too high.
Li Cheng took the showerhead off the rack, aimed it at the toilet, and pulled the lever.
A moist airstream immediately sprayed out, growing stronger as he turned the lever.
Ding-a-ling—
A coin was struck by the airflow, bouncing a few times off the inner walls of the toilet, and finally popped out, falling to the floor.
Its surface slightly scratched, the front bore the emblem of 80∑, indicating its denomination, while the back depicted a brilliant star chart of a certain star system.