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.
Lex Luthor: Lenny, I've always considered you the Dutch Elm disease in my family tree.
Trivia: Christopher Reeve originally refused to return for this film as he hated "Superman III" so much. He eventually changed his mind when he was given more input in the script.
More questions & answers from Superman IV: The Quest for Peace
Answer: Lacy had gotten tired of her dad's newspaper, big-city life and decided to move to Smallville because she wanted to experience life at a much slower pace and even decided to live on a farm.