Have you ever been on a film set? If you have, you know what a surreal experience it can be. Doesn't matter if you know the people making the movie or the material; the very nature of what goes on there, the hurry-up-and-wait work environment dedicated to capturing images and moments that are a willful fabrication of reality, is contradictory enough to create a mild existential crisis if considered too closely.
To put it in other words, such an environment is the quintessence of "movie...