Continuity mistake: Ferris is messing with the equalizer on his stereo system (the one that plays the snoring), while he's talking to the camera. Watch the levels on the equalizer, they change from the close-up and back to normal in the wide shot.
manthabeat
23rd Dec 2014
Ferris Bueller's Day Off (1986)
15th Mar 2004
Ferris Bueller's Day Off (1986)
Visible crew/equipment: In the scenes where Sloan, Cameron and Ferris are driving to Chicago for the first time in the Ferrari, there is a brief shot of the Ferrari passing a car on a bridge. Look in the bottom right hand of the screen, a perfect shadow of a person on the road. (Original VHS version, it has been taken out of the recent TV versions).