i created a vacuum in the atmosphere and the game broke why?

i canged the air pressure to -9 useng the water block i drive around a bit then it said instubillity and stopped working.

 

I have seen enough SciFi flicks to know that if you put things that are supposed to be in normal air pressure into very low pressure or zero pressure, then they won't do so well really.

I guess how far you are willing to push it? Negative pressure is real thing, but occurrence of it is rather, ummm, rare, I guess.

https://en.wikipedia.org/wiki/Negative_mass

Physics gets really really weird in that area, my brain is too mushy to comprehend, but nothing is as certain as uncertain


Then again, I'm not quite sure if game engine needs to simulate warp drives and alike, yet

In sense of atmosphere, I do wonder if it really is possible to have whole atmosphere as negative pressure and even if it is, I would think things probably are not going too well for vehicular objects anyway, but my poor brain is quite mushy and this all is way over my head, special relativity is kinda like challenging to grasp for me.