* HeyItsThatGuy:
** [[TropeNamer The original]] [[ChuckCunninghamSyndrome Chuck]] [[HappyDays Cunningham]] played Brad from Smallville.
** [[Film/{{Superman}} Kid Kal-El]] got an awesome souvenir just by being outside that photo booth and lifting Pa Kent's truck.
** The skipper on the oil tanker went on to be [[Film/SupermanIVTheQuestForPeace President of the United States]].
** [[Film/SupermanII He was looking for a curl]] and instead was watching the fires spread...[[ShapedLikeItself like fires]] in Smallville.
** [[Film/SupermanII Don's wife]] ran off with another guy to Colombia.
* OldShame: Creator/ChristopherReeve felt so ashamed about this movie that he swore he'd never play Superman again. It took lots of persuasion to bring him back for ''Film/{{Superman IV| The Quest For Peace}}'', which sadly didn't turn out much better.
* {{Promoted Fan|boy}}girl: Annette O'Toole admitted in an interview for the documentary ''Look, Up in the Sky!'' that she loved reading ''Superman'' comics as a child, and preferred Lana Lang to Lois Lane.
* RetroactiveRecognition: So Lana Lang [[CastingGag grew up to become]] ...[[{{Smallville}} Ma Kent!]] Really, Annette O'Toole played Lana Lang here and (unbeknownst to the producers of the TV show) Martha Kent to Tom Welling's Clark.
* TalkingToHimself
* ThrowItIn: Reportedly, Richard Pryor was encouraged to ad-lib a lot, but because he was a Superman fan, he mostly stuck to the script.
* WhatCouldHaveBeen:
** According to Ilya Salkind, the original script was going to involve Brainiac and Mr. Mxyzptlk (who would have played by Dudley Moore) teaming up against Superman, who would also meet his cousin, Supergirl, who was adopted by Brainiac.
** The original title for the film was going to be ''Superman vs. Superman''.
** Alan Alda and Frank Langella were both considered for the role of Ross Webster. [[Film/SupermanReturns At least Frank got a role later.]]
** Gus Gorman was meant to be the human guise of Brainiac.