Well, goody for you, but I don't see how that's remotely relevant.
I still say that it's not a far stretch for an average Joe to think of the pressure on the inside pushing out, and if you are trying to DEBUNK something, you need to do more than just say "it's pressurized".
Most of the answers to this question are largely correct. Boeing, Douglas, and Airbus have always insisted that doors leading into the passenger cabin be ‘plugs.’ That is to say they are bigger than the opening. That’s why they have to be pulled inward and tilted to even fit through the opening. With even 1 psi of pressure, the strongest guy in the world can’t open one.
Where it gets a little more complicated is some of the smaller airliners like CRJs. Because many of them have fold out stairs at the front door, some of those doors are not plugs. Even at that, once they are closed, even a psi or two will bind up the mechanism so bad that they cannot be opened. And if you fly on these type of aircraft frequently you know that even unpressurized the doors sometimes cannot be opened or closed!
Yes, “goody” for me. Do you think that I opened and closed a few doors during my career? That is relevant, it is experience with doors and the pressurization of airplanes.
You seem to be less than an average Joe. Most people do not need to give the information you are requiring in order to DEBUNK something. Take care of yourself Izzy.