Still, it's a very cool effect! +1
It's a cool phenomenon, but I'm sorry to say that you haven't broken physics too much. The way TPT works is that certain gases, like GAS, NBLE, and SMKE are coded so that the particles always generate a tiny amount of pressure. When you put those in a box, the pressure becomes very noticable, even without the OXYG, HYGN, CO2 or OIL.