[Sopater]

It is physically impossible to open an airliner door in flight as the pressure differential between the cabin and outside air creates a force of several tons holding the door closed. The Incredible Hulk couldn’t open it.

Are you sure of this? I would think that the higher pressure would be inside the cabin and the lower pressure would be the outside air, making the pressure differential a positive pressure from inside the plane to the outside of the plane. If you did open the door, you would essentially get sucked out.

[noiseman]

The higher pressure is inside the fuselage, but the doors are designed as plugs so that the pressure holds them closed. The clever mechanism that permits them to be pushed through the opening to get the door out of the way, yet function as a plug when closed, makes it deceiving. Notice that when they open the door on an airliner, it first must be pulled in before it can be pushed out.