I was working near another engineer once who was attempting to arrange flow of dry nitrogen through a plastic cabinet which was in the shape of a cube, one foot on each side.
He had a regulator between the nitrogen source and the cabinet and a pressure gauge monitoring pressure in the box.
As I was watching he had the access door to the cabinet closed and was cranking up the pressure. I think the gauge read about 10 psi. Since each face of the cubic box was 144 square inches I was able to quickly approximate that the pressure on each face must be 10 times 144 or about 1500 pounds. That's right. About three quarters of a ton pushing on a thin sheet of plastic
Just as I was about to warn him about the danger of what he was doing, the pressure blew the back out of the box launching it into his leg. It left a good bruise but didn't break the skin. I was just a second or two late in my warning.
If we apply the same calculation to a window pane which is, for example, three feet on a side, that would be about ten square feet or 1440 inches. If the pressure on one side of the window was just 5 pounds (one third of atmospheric pressure) that would put a force on the window of 5 times 1440 pounds, or about 7000 pounds. That would be about 3.5 tons. It would be like putting the entire weight of your car on the window.
Years ago (about 1973), I found out those very things you explained about the N2 box when I put about 6 pound of pressure into a $4500.00 high purity French quartz epitaxial tube. Kaboom.