* As pointed out by [[WebVideo/TheSpoonyExperiment Dr. Insano]], why the heck did Ferris convince Cameron to "borrow" the Ferrari if he was just going to leave it in a parking deck all day? Even if you accept the idea that he didn't want to rack up the mileage, then why didn't they just use a taxi instead?
** Because they'd actually have to PAY for a taxi from the 'burbs into downtown Chicago, and it would be pretty pricey. Not something Ferris could easy charm his way out of.
** Because Ferris follows only one rule: the RuleOfCool.
** [[AlternateCharacterInterpretation Or because he's a manipulative psychopath who's just curious about how far he can tip his "friend" with emotional leverage?]]
** Ferris planned the day the same way [[IndyPloy Indiana Jones plans his]]. He needs a nice car, so he gets a nice car. He has a nice car, so he drives it in to the city. He's in the city, so he visits some attractions. He doesn't know what he's going to do next, so he just goes with the flow.
** .... No, they actually explain this in the movie. Before they can do to the city, they have to pick up Ferris's girlfriend, and they have to do it with Rooney right there, expecting her dad. Since her dad is apparently a very wealthy, influential person, he'd drive a sweet car, so Ferris needed to borrow the Ferrari to fool Rooney into thinking it was him. The plan was to bring the car back when they were done, but he was enjoying it too much.
** It's a bit of both: he wanted to see if Cameron would let him take it, and came up with "piece of shit" rationale when Cameron tried to resist. And he did that because it's a [[CoolCar sweet-ass Ferrari]].
** Although this is perhaps [[WatsonianVersusDoylist more of a Doylist answer than a Watsonian one]], I think that Ferris's putting the car in that garage is the film's way of telling us that his motives are at least partially sincere. If he had no real concern for his sick friend at all and just brought him along so he could joy ride in the family's cool car then he would have done so, or tried to. The parking confirms that the car was just a cool bonus and not the real, primary motive.
** Also, if Cameron's father never drives the Ferrari and doesn't allow anyone else to even touch it, why does it have fuel in the display room?
*** You have to run cars occasionally to keep them in functioning order. Some of the mileage is probably from Cameron's father doing that.
*** Ferris also mentions (during his aside at Chez Quis in the restroom) that he's caught Cameron sneaking rides in it.
*** Negatory, he says he caught Cameron digging the ride they were on a few times.
** He never planned on parking it in a garage. Cameron was getting really stressed out over driving it around Chicago, so Ferris comes up with the idea to park it then and there, and take a taxi when they need to get around instead. His original plan was to drive around Chicago in the Ferrari.
* Noah points out another piece of FridgeLogic in the audio commentary for the Insano review - what happens the next day when Ferris shows up to school, ''not'' dying of a terminal illness? He observes that most people in the same situation would get lynched, but says Ferris could probably laugh his way out of it.
** He never said he was terminally ill. He never even IMPLIED it. That was just a stupid rumor that got spread. Also, I don't think he went to school the next day either. In fact I wouldn't be surprised if he didn't show up again, given the climax.
*** No, he explicitly says that he thinks he needs a kidney transplant when talking on the phone to his classmates.
** I always assumed it takes place on a Friday. It really seems like a Friday, doesn't it?
** Exact words: He said that he thinks he needs a kidney transplant, not that he definitely would. He can fully explain away why he wouldn't, such as "food poisoning".
** Also, he could pretty easily pass the "kidney transplant" as a joke: "Haha, you guys took me seriously? I was kidding!"
** Or he could've simply said "Eh, you know how it is when you get sick. You're always afraid it's more serious than it actually is."
** Let's not overlook the most important detail: he was talking to a ''freshman''. All he has to do is deny he ever said it, and nobody will believe the kid over Ferris Bueller.
** The Braves-Cubs game they go to happened June 5, 1985 (which was a Wednsday), which would have been about two weeks from graduation, so it's not like he'd be going to there for much longer.
* Another bit of FridgeLogic: what happened to the ''real'' Abe Froman?
** He was outside the restaurant, with Ferris' dad, just as they left.
*** When in the film does it say (or even ''imply'') that?
**** [[http://www.sensesofcinema.com/2009/feature-articles/ferris-buellers-day-off One guy hypothesizes that Ferris invented Abe Froman, calling ahead of time, claiming to be Abe Froman, while clearly being a teenager, for the thrill of it.]]
** Ferris is shown looking at the reservations list when he picks out Abe Frohman's name. He probably picked out someone who hadn't arrived but was five or ten minutes late. It's one of his standard off-the-cuff ploys... it has just enough safety to make going through with it non-suicidal (if he's five or ten minutes late he's probably going to be a lot more late or not show up at all), and just enough risk to keep it fun.
*** Well, if he wanted Cameron and Sloan to believe that it was all spontaneous, then he'd have to look at the book so they'd know where he supposedly got the name from. He could still be the one who made the reservation. And since Abe doesn't show up, I'd say this is actually plausible.
* OK, so the main characters visit downtown Chicago. And there's a huge culture festival/parade going on in the middle of a weekday? We know it's not a holiday or weekend because school is in session. But if it's during the week, shouldn't all the people in the crowd also be at work or in school?
** Maybe it's a week-long thing?
** If I recall, that was actually a fluke. The parade/festival was going on while they were shooting, so they decided to work it in.
* We all know that Ferris is audacious, but he was downright stupid during the parade scene. He's standing in the middle of a float, hundreds if not thousands of Chicagoans are on hand to watch, the whole thing's almost certainly being broadcast on local television....and Ferris isn't even wearing a mask (which wouldn't raise any suspicions, due to the parade's carnival-like atmosphere)! Sure, I know it's a big city - but what if one of Ferris's schoolmates came home and saw their parents watching footage of the parade on the evening news?
** Well, that's assuming any of the news cameras cared enough about what he was doing to zoom in. Can you pick out a schoolmate's face from hundreds of feet away?
** Considering the fact that the entire parade has broken out in a fit of dancing thanks to this kid on the lead float, I'm sure news cameras would zoom in on him, and the fact that Ferris Bueller has garnered a near prophet-like status in his hometown ("Save Ferris" anyone?), it's not far off to think that more than one person would recognize him.
*** Fridge Brilliance, actually. Ferris is so prophet-like that it wouldn't be unusual for someone to make a Ferris mask and wear it. As a culture festival, it would be even more likely. And then there's that even if people DID recognize him, there's that they would probably realize he was faking being sick and cover for him.
*** I don't think a Ferris mask could look quite so lifelike as the real Ferris...
*** The bit with the parade could be seen as Ferris showing his sincerity about giving Cameron a good time. He wanted to do something so audacious and over-the-top that Cameron would absolutely never forget "The time we all skipped school and went to town and Ferris got up on a parade float and sang". In that moment he cared more about Cameron seeing something unforgettable and awesome than he did about getting caught.
*** Cameron and Sloane also tell him exactly this. That he's crazy for going on to the parade float and that he's so nailed as a result. Ferris blows it off by saying "who cares, who am I (to the spectators)?
*** Uh, Ferris didn't start the parade, it was already in progress. In fact, it wasn't even scripted. There just happened to be a parage going on during filming.
* Why didn't Jeannie give the police Rooney's wallet? After she kicks the crap out of him, you see his wallet drop out of his pants to the floor. At the end of the movie when she saves her brother's ass, you see her take Rooney's wallet out and fling it in the mud. Why in the hell didn't she give it to the police when they came? Also, another one: Why the hell did the police arrest her for calling them? She was obviously hysterical, so why would they assume it was a joke?
** There actually was no scene where she found the wallet, or even enters the kitchen, until the end of the film. It's likely that she didn't find it until after they got home.
** In real life, 911 can and has reprimanded kids for making emergency calls when the situation was serious, only for them to find out the kid was really telling the truth. It's resulted in at least one death because they didn't take the kid seriously. At least in this case, they sent out someone to check for Jeanne.
** She was also skipping school herself by this point. When they got there, she probably had no good explanation for why she ''just happened'' to be there at the same time there ''just happened'' to be a prowler (who they found no evidence of). The cops probably assumed she was on drugs, had hysterically called them while experiencing a bad trip, and hauled her in for testing (using the false alarm as an reason to do so). When she tested clean, they just gave her a reprimand and called her mom to pick her up.
** Though one wonders what she could have gotten away with if she just said "Ferris suddenly felt a bit worse and begged me to come check on him". If her claim was investigated (by say, the police going to check with Ferris and finding him not there), she'd win because she just wanted Ferris to get busted. If it wasn't, she could probably avoid a lot of trouble (family emergencies typically get leniency).
*** They couldn't enter her house without her permission or a warrant. Since she would be found out immediately if she let them see that Ferris wasn't there, she would have no reason to let them check.
* What exactly does Rooney hope to accomplish by catching Ferris? Yes, he's a bit of a DesignatedVillain for wanting to catch a truant, but here's the thing: Ferris is technically '''not''' a truant on this occasion. His mother called him off. At that point it no longer matters if he is really sick - ''he's excused''. The school has been informed of his impending absence by a parent or legal guardian. The reason for doing so, and whether or not it was true, is immaterial. Now, it's true that Ferris has blatantly skipped school before (and even hacked the school records to hide this fact), so I'm not saying his actions are justified. But catching him on this one occasion won't prove that it has happened before. Rooney could tell his parents "told ya so", maybe get him grounded. But his stated goal is to get Ferris held back another year - and all he did was prove a kid lied to his parents on this one occasion. From the school district's point of view the facts are this: 1) Kid said he was sick. 2) Parents called him off. 3) School records (unknowingly tampered with) show that this hasn't happened an inordinate number of times. 4) Kid graduates.
** You're forgetting that Rooney witnesses Sloane Peterson speeding away from campus with Ferris. This undoubtedly is the tipping point that made him want to take matters into his own hands.
*** Okay, so ''Sloane'' is guilty of skipping school, since the parent who called her off was a fake. But Rooney never shows any indication that he suspects this after the phone conversation. He gets suspicious when he hears that Sloane might be dating Ferris, but when Ferris himself calls during that conversation he panics and swallows the lie. Having the fancy car show up apparently seals the deal, as he has no idea that Ferris is ''that'' much of a MagnificentBastard. Even the comment he makes to himself ("So ''that's'' how it is in their family") suggests he is really convinced that was her father.
*** Rooney's dialogue about the history of Ferris at school - and about his mother being convinced by all the acts - suggests that Rooney isn't really out to find evidence that other staff/parents will believe. Rooney probably sees himself as the Anti-Hero cop, busting a wise-ass lowlife who's too smug. It's about facing down Ferris, rather than about anyone else. He wants to catch Ferris in the act and gloat, in order to show Ferris that not everyone will follow his game or believe him. He's basically trying to give Ferris a rude awakening. It's become a personal quest.
** He actually saw Ferris absence record change on his computer from 9 days to two. That alone would, nay, ''should'' raise all kinds of alarms for anybody.
*** He has no proof. And he doesn't spend the day trying to find backups of the schools computer records, he spends it thinking that if he can just find Ferris, he can shout "A-ha!" and win.
** Rooney clearly intends to abuse his position and punish Ferris [[DisproportionateRetribution extremely heavily]] whether his absences are excused or not, if he can catch him in the act. Catching Ferris would just be his excuse, he'd march him home himself and prove to his parents he wasn't sick, and use Ferris' fear and the parents' embarrassment to keep them from arguing with what he wanted to do. It's one more sign that he's petty and power-mad, not a misunderstood educator.
* Aside from RuleOfFunny,why does Ferris wait until nine days of skipping school to hack into the computer to change the number of days he was absent?
** Given how they mentioned it several times, the computer (and the car) were pretty recent so he didn't have the chance to do it before, also hacking the school records probably isn't that easy so he had to prepare for it in advance.
* Why exactly did Cameron get ''that'' upset when he saw how much mileage those parking guys racked up? The group already put miles onto it by driving it to and from downtown Chicago. Cameron's dad seems like the kind of guy who would be just as upset no matter how many miles were put on it, be it 1 or 100.
** Because they were planning to drive it home in reverse, to hide the fact they drove the car. And having two thousand extra miles means they can never reverse-drive it in time before Cameron's father gets home.
*** There was less than 200 additional miles on the odometer, not two thousand. Presumably, they were planning on rolling it back like they did at the end.
* Did anyone else find it odd that there are no students with ''C'', ''D'', or ''E'' names in the economics class? The class roster goes straight from Bueller to Frye. I realize this was for expediency's sake from a technical standpoint, but it still makes you wonder what the probability of that would be in real life.
** Speaking as a teacher, the odds are pretty high. With, say, twenty-five students in this class, what are the odds of each student's last name beginning with a different letter?
* How do the playfully-racist extras rack up 2500 miles on a car in six hours? The car's speedometer tops out at 70 mph; by my math they'd be hard-pressed to add more than 500 miles.
** They didn't. The odometer started at 125, and ended at 301. That's only 176 miles. And that is the tachometer. The speedometer goes to 160.