Because our view of an aircraft interior is typically what you see above, it's kind of cool to see, below, what we're actually sitting in:
Now you see why airplane cargo containers are shaped the way they are.
And it's only in cross-section that we can appreciate how truly gargantuan an Airbus A380 is:
While it's rare for us average Joes to see airplane cross-sections, there's at least one company that looks at them all the time. In fact, they create them. Air Hollywood, started by a movie producer who found shooting films in actual airports too logistically constraining, bills themselves as "the world's premiere aviation-themed studio." Whenever a movie, television show or commercial needs to be shot inside an aircraft, without the pesky security regulations of an actual airport, Air Hollywood is the only game in town.
Perhaps due to the relative proximity of L.A. and Washington State, the company's mockups are Boeing-based, with nary an Airbus in sight. Air Hollywood stocks full interiors for the 727, 767 and every model in between.
Located inside their studio facilities, the lighting of the full-scale mockups can be precisely and easily controlled, and of course there's no weather to worry about.
The aisle widths are cheated a bit, providing room for cameramen to maneuver.
The company also provides smaller "mobile wall" units that can be lengthened or shortened, Lego-like, as needed, and provide more than enough room for cameramen and even dolly tracks.
The "mobile wall" units also allow for getting overhead angles that would otherwise be impossible to shoot.
Air Hollywood stocks cockpits too, so audiences can watch a drunken Denzel behind the stick in Flight.
And if there's one place that's truly impossible to shoot in in an actual aircraft, it's the lavatory. Hence the company's knocked some up with "wildable," or removeable, walls to stick cameras in and out of.
The company's business isn't purely filming-related, by the way. This being L.A., they've also set up a sideline business... teaching dogs how to fly in airplanes: