There are some movies we can't help but watch over and over, and one of those is Ferris Bueller's Day Off.
But endlessly rewatching the classic comedy has taught us a lot.
Still, no matter how many times you've watched the movie, there are some blink-and-you'll-miss-them details that speed right past you.
Here are 10 you probably never noticed:
1. Ferris has three siblings
Notice anything strange about the family portrait on Mr. Bueller's desk? That's right, there's four kids.
The people who own the home where the movie was shot revealed that Ferris and Jeanie's younger siblings were cut out of the movie.
But you can still see hints of them around the house, like the crayon drawings on the Bueller family's fridge.
2. Mr. Peterson's disguise
Ferris's room is loaded with Easter eggs that pay off when you re-watch the movie (but more on that later). One of the biggest is the trench coat, hat, and sunglasses that Ferris wears to pick up Sloan from school.
They're already waiting on the mannequin in his room, the same one he hides in his bed later in the movie. Pretty sneaky.
3. John Hughes is in the parade scene
The director makes a (very) brief cameo in his own parade, wearing a disguise.
Jeanie was in the crowd incognito as well, or at least Jennifer Grey was. She was upset about missing the big parade, so she arrived in the crowd dressed as a "crazy autograph hound," and was almost kicked off the set by security.
4. Ferris goes to Shermer High
Move over, Marvel Studios. John Hughes had a shared universe way before it was cool.
5. Ferris is keeping an eye on his room
Eagle-eyed fans have charted almost everything we see in Ferris's room, and it's basically a wish list of cool '80s technology. Along with a wicked sound system and record collection, Ferris has his Emu Emulator II keyboard, which would cost around $8,000 back in 1986.
But one piece of tech most people don't notice is his security system. You can spot a security camera screen in one shot.
6. Very creative license plates
You won't get any points for remembering the vanity plate on Cameron's Ferrari: NRVOUS (nervous).
But the rest of the cast have meaningful plates too:
- Mr. Bueller's says MMOM for Mr. Mom, which was written by Day Off director John Hughes.
- Mrs. Bueller's says VCTN, as in National Lampoon's Vacation, which was also written by Hughes.
- Mr. Rooney's car has a 4FBDO plate, meaning "For Ferris Bueller's Day Off."
- Finally, Jeanie's plate is never seen in the movie, but it supposedly read TBC, for Hughes's movie The Breakfast Club.