When Ferris is in the phone booth, he tries to get the operator but then hangs up the phone. He then scans the Town Square. The camera pans counter-clockwise and the receiver is nowhere in sight.
The placement of the mannequins inside the Resnick's Store Mannequins building changes.
The clock in the booth with a broken face is shown in a distant shot, than in a close-up, where more cracks appear in it than before.
In the police station, Ferris' right hand touches a jail cell bar, causing the entire cell wall to wobble flimsily.
When Ferris is in the phone booth and hangs up the phone, a man with dark hair and glasses can be seen in the reflection of the door glass.
When Ferris pokes his head in the doorway of the bakery, several moving crew members heads can be seen reflected in the front glass window- at about the level where the pies are displayed.
As Ferris stands in the jail cell facing the wall, he hears the cell door squeak as it starts to swing shut, at which point he whirls around and runs out of the cell. Right before he exits the cell, he pauses- a which point the shadow of a person (possibly the stagehand who pushed the cell door) can be seen moving rapidly to the left out of frame.
Actually, no...that is Ferris' own shadow. It moves in perfect sync with him as he exits the jail.
Actually, no...that is Ferris' own shadow. It moves in perfect sync with him as he exits the jail.
Just after Ferris (Holliman) jumps over the counter of the diner, the heavy shadow of the camera can be seen suddenly encompass the napkin holder on the counter.
When Mike is quoting from Dickens' "A Christmas Carol", he says that his hallucination might be due to, among other things, "a fragment of an undone potato". Dickens actually wrote "an underdone potato". Of course, this goof could be seen as simply Mike's faulty recollection of the text.
When Mike looks into the projection booth at the movie theater, the light from the projector shines directly into his eyes. This would blind him, and would be something he would want to avoid if he wants to see into the booth, past the projector.