Goofs

When Cassandra talks to Wayne about going to L.A., her hands suddenly disappear from his shoulders.

The glass that the men are carrying is suddenly held by clamps when Wayne drives through it.

When Wayne meets Bjergen Kjergen, we see alternating front and back shots of her. From the back, she is leaning to the side and her arms are crossed. From the front, she is leaning forward with her hands folded.

When Del is talking to a crowd in the donut shop, a waitress walks into the shot and stands next to Wayne. She then walks out behind him. In the next shot she is standing beside him again.

When Del Preston loses his mind, he mentions positioning an "M60 Browning" machine gun on either side of the stage. The M60 was manufactured by the SACO Defense (now General Dynamics) and U.S. Ordnance companies, but not Browning.

When Wayne is driving away in the sports car after the glass/chicken/melon crash, he drives past a sign that says "Santa Barbara." Santa Barbara is in Southern California, many hundreds of miles from Aurora, Illinois, and would not be signposted that far away, showing that the film is being shot in California rather than Illinois.

The scene is a shot-for-shot homage of the ending to "The Graduate" in which Dustin Hoffman takes the Santa Barbara freeway exit in a similar vehicle just before stopping at the same service station, the "errors in geography" in this portion of the film are deliberate.

In the "returning home from England" plane scene, it's obviously a mirror image (identifiable by the writing on the plane being reversed). However, due to the nature of the jokes during the plane scenes, this was probably intentional.

When showing Wayne the vinyl records she got at a garage sale she states "Can you believe they're not making vinyl anymore?" This isn't true. Vinyl albums have always been, and even in the 21st century still is, the media of choice among audiophiles.

At the time of film's release, the production of vinyl was greatly reduced and most popular albums of the day and for many years afterwards were not being produced in that format.

Wayne asks the city bus driver to take him and Cassandra to a certain place. Public buses only travel a set route, you cannot use them as a personal taxi.

This is an obvious joke, of course a city bus from California is not going to drive them to a town in Illinois.

Bobby chases the spies into a club called the Toolbox. Wayne, Garth, and the other two spies try to exit the club, but can't because it's being blocked by a stage. A blocked exit would cause a fire hazard and injuries and fatalities.

Regardless of this, many nightclubs and venues often violate fire safety codes, so it's not impossible that the Toolbox does as well.

As he chases after Wayne Campbell between cars, Bobby Cahn is played by an obvious stunt double.

When Wayne jams a guitar in the doors of the church after rescuing Cassandra, you can see the prop bend in a very un-guitarlike way when Bobby pushes at the door.

When Wayne is on the phone with Bobby Cahn, the toaster is smoking as if something is burning. However, neither of the toaster switches are pushed down.

Same footage used twice of Wayne running into the churches at both locations.

When Wayne is fighting Cassandra's dad and her dad does the flying kick you can see that this is performed by a stunt double as you can see their face.

When Garth and the biker rescue Wayne after he falls, a Steadicam operator is reflected in the window.

When Garth is floating in the air while kissing Honey, the cable that is suspending him is clearly visible.

In several scenes, particularly those at Stan Mikita's Donuts and at Waynestock, palm trees and mountains can be seen in the background. There are no palm trees or mountains anywhere near Aurora, Illinois.

The overhead shot in the opening of the film is meant to be Aurora, Illinois, however, the shopping plaza that is seen is actually Cermak Plaza in nearby Berwyn, Illinois.

Jerry Segel has a white eye, which he claims is because is because he's a partial ocular albino. He explains that his white eye has no pigment which is the cause of there being no color. This is scientifically inaccurate. When a human eye has no pigment, the eye is light blue.