maths matters, like a car that is bullet proof, does it mean its absolutely bullet proof ? no, if you design a bullet that can shoot tank, then it should pierce through the car. same to that anti-flood design, you just need to push so much water in, until their mother also not recognize.

how much gas do u have, and how do u transfer and release them ? they currently such the seawater also having difficulty, you want to replace that with gas ? btw its easy for ppl in tunnel to light up your gas b4 it fill up

nope it wont, like you toss a million tons of water into the tunnel, what the ppl inside can do about it ? nothing much, but if you pump gas in, its so much easier to handle, just pull a cable to where u pump the gas in, light up the gas every 1 min, small explosion at the tunnel entrance, what makes you think those ppl inside wont do anything until 72 hours later, until the entire area is filled with gas ?

This post has been edited by narf03: Dec 16 2023, 08:05 PM