Visible crew/equipment: When the SWAT van is lifted up there is a crane reflected on SWAT van.
Visible crew/equipment: When Superman cries "Don't do it, the people" a boom mic is reflected on the glass behind.
Superman IV: The Quest for Peace (1987)
22 visible crew/equipment mistakes - chronological order
Directed by: Sidney J. Furie
Starring: Gene Hackman, Christopher Reeve, Margot Kidder, Jackie Cooper, Marc McClure
Revealing mistake: After Nuclear Man destroys the cab's hood, the shot changes and there's a thick string running behind him all along the car.
Superman: You'd risk world wide nuclear war for your own personal financial gain.
Lex Luthor: Nobody wants war. I just want to keep the threat alive.
Trivia: During the making of this movie Christopher Reeve and Sidney J. Furie didn't get along at all and often clashed with each other.
Question: Why is this movie so full of mistakes and plot holes? Was it created by incompetent crew?
Answer: It should also be noted that the film was originally slated to have a budget of $32 million, which is in roughly the same range as the budget for "Superman III" and movies like Tim Burton's original "Batman." However, shortly before shooting began, the budget was cut by nearly 50%, all the way down to $17 million. As a result, the production was very patchy and rushed. This had an adverse effect on everything.
Answer: It was made on a very low budget. Golen - Golbus productions bought the rights to Superman. They were mostly known for B-Movies with not so big name stars. It was there attempt to play with the big studios. Plus at least 45 minutes of scenes were cut out, with major subplots.
In addition to budget cuts, they kept shortening the runtime, meaning scenes needed to be cut. The comic book adaptation has the uncut scenes and makes much more sense.