Originally Posted by
FlyingDiver
You sure about that? That would be about 4psi times the surface area of the container, which could easily be 40in^2 or 160 pounds pressure to open it. Or something like that, I'm too lazy to do the calcs right now.
Now this is getting interesting
Turns out I opened my other watertight box while in the air too, but I'm probably just going to wait that one out instead of breaking. Also stuck, so it's definitely the pressure.