In the film "Fight Club" we find out that the character Tyler Durden doesn't actually exist. He is a figment of the Narrator's imagination. He so hates his life that he subconcoiusly creates the persona of Tyler Durden.
In "Ferris Bueller's Day Off," Cameron is lying in bed sick, and mentally despressed. He then receives a call from Ferris telling him to get out of bed, and that he will soon be over.
Here's the theory reposted.
My favorite thought-piece about Ferris Bueller is the “Fight Club” theory, in which Ferris Bueller, the person, is just a figment of Cameron’s imagination, like Tyler Durden, and Sloane is the girl Cameron secretly loves.
One day while he’s lying sick in bed, Cameron lets “Ferris” steal his father’s car and take the day off, and as Cameron wanders around the city, all of his interactions with Ferris and Sloane, and all the impossible hijinks, are all just played out in his head. This is part of the reason why the “three” characters can see so much of Chicago in less than one day — Cameron is alone, just imagining it all.
It isn’t until he destroys the front of the car in a fugue state does he finally get a grip and decide to confront his father, after which he imagines a final, impossible escape for Ferris and a storybook happy ending for Sloane (”He’s gonna marry me!”), the girl that Cameron knows he can never have.
It really makes you think. If you watch the movie you can see that Cameron is kind of a normal guy who makes logical decisions. However, Ferris is Cameron's Id. He is impulsive and does what he wants without consiquence. If you don't believe so, here's a list of crimes that Ferris could be charged with.
Impersonating a Police Officer
Odometer Fraud (both tampering and conspiricy)
Delinquency of a minor (if Ferris is 18 and Sloan is under 18)
Trespassing (Multiple times)
Altering a public record
Grand Theft Auto
Fraud (Multiple times)
Inciting a riot
Underage Consumption of Alcohol
Failure to wear seatbeats
Speeding in a school zone
So the next time you get a chance watch "Fight Club" and "Ferris Bueller's Day Off." Maybe you will view it in a different light.