
Common Ignorance
Rather like trying to commit suicide by slitting your wrists horizontally it is a common misconception that it is actually possible to open the cabin door whilst the plane is airbourne. The door is designed for this.
The physical process of opening the door requires it to be pulled inwards - The air pressure inside the cabin is high in comparison to the external wind rushing past at 600mph - and then pushed forwards into the flow air, before even the pressure seal is broken.
This combination actually makes it totally impossible for anyone to try to make a silk-less leap of faith at 30,000 feet.
I am still confused when I hear of people trying to open cabin door inflight, even more confusd when they get arrested afterwards. How can you be arrested for attempting to do the impossible?