Life goes by pretty fast. If you don't stop to look around once in a while, you might miss it.
This crazy fan theory is some effed up shit, man. Insane in the membrane.
It goes like this: Ferris Bueller's Day Off: a story about a spontaneous, popular high school kid who decides to skip school for a day to go out on the town and wreak havoc, having the best day of his life. He goes to an upscale restaurant, lip-syncs on a float in a parade, goes to a museum, and rides around town in a Ferrari, all with his girlfriend Sloane and his boring, friend Cameron who isn't in school because he's actually sick. The Ferrari belongs to Cameron's dad, who will "kill him" when (and if) he finds out the car was driven all around Chicago. But wait. Let's analyse this for a moment. Ferris is everything Cameron is not. He's fun, popular, cool, all around awesome. Sloane is a girl Cameron obviously likes, but can't have, because she's with Ferris. This offers up another possible interpretation of the film: The whole goddamn day happened all in Cameron's head. Even Ferris and Sloane are figments of this deprived kid's imagination. Cameron is home sick the entire time--just lying there, imagining the perfect day, and the perfect friends. Think about it: that's the only possible way three people could see so much of Chicago all in one day...He even goes so far as to imagine Ferris' personal life, and what's going on at his house in the meantime. Of course the part about Cameron going balls-out insane is probably real--while imagining the whole day, he comes to a realization that he has to stop living in a fantasy world in which everyone pushing him around is okay, which brings him to his breaking point of busting up the Ferrari. It could also be said that Ferris and Cameron are the same person Cameron has created a split personality (or rather, alter ego), Ferris, whom he believes to be a separate person. I won't go too in depth about it, but just think about it.
-Creepy, right? Of course this theory doesn't work on all counts; as there are parts of the movie that obviously contradict it, but it's fun and thought provoking.
"Here's where Cameron goes berserk."
"Ferris Bueller...You're my hero."