Jazetopher

Corrected entry: The timing on the doorbell message at Ferris' house changes between the first time and the second time it is heard.

Scrappy

Correction: In order for the Doorbell Tape to work, he would have recorded the same message clips over and over again on the same tape, as no rewind feature would be available without someone there to rewind it manually. Since he recorded it more than once on the same tape, the next series of clips you hear should differ slightly as we hear, due in part to the fact that it's not the same clip as heard earlier. As such, continuity is not a factor, and no mistake is made.

Jazetopher

Corrected entry: When they are all driving in downtown Chicago, Ferris is not staying within the lines of the street at all, he's about 1/3 into the next lane to the left, yet none of the other cars seem to mind.

Correction: Cars don't have feelings, so of course they don't mind. If you mean the drivers, the scene is not that long, and we cannot make out their faces enough to see if they are agitated at Ferris' bad driving or not.

Jazetopher