Continuity mistake: The toy penguin that catches fire is already burned and damaged, when it's supposed to come brand new from the seller's stall.
Continuity mistake: When the bucket of yellow paint falls on the old man, he turns around and starts to walk backwards. In the next shot, he is facing forward.
Continuity mistake: The lid that falls on Clark has a bumpy side. One of the shots shows the lid falling with the bump pointing at Clark's head. For the rest of the shots the bumpy part is on the left side.
Continuity mistake: When the bus that Clark and Jimmy are on pulls up to the traffic jam, you can see the smoke from the fire is wafting all over the place. When the angle changes when the two climb off the bus, however, the smoke is limited to the distant view.
Continuity mistake: When Superman arrives at Pisa for the second time, the sky changes from violet to blue.
Continuity mistake: In the bar, while bad Superman is destroying the bottles, the way they are placed and the ones that are broken or undamaged keeps changing between shots.
Continuity mistake: Bad Superman punches Clark and he lands by a car door. In the next shot the door has magically moved on top of him, which makes Clark take it off of him.
Continuity mistake: When Clark is choking bad Superman, his right hand cleans itself after Superman disappears.
Continuity mistake: When Superman lands in Ross's attic, a chair moves to the left between one shot and another.
Continuity mistake: While bad Superman is in the bar, the whiskey bottle's label faces the window. From the window's point of view there's no label seen.
Continuity mistake: On the Grand Canyon, when Gus is about to get on the donkey, the first shot shows him several meters ahead of Vera. The next aerial angle shows him very close and parallel to her.
Continuity mistake: During the credits, a red and white pole with a light on top appears to the right of the crashed green car.
Continuity mistake: After Superman is swallowed by the super computer, red acid spills on the computer. Right before the acid breaks the floor, the computer is shown again, completely clean.
Continuity mistake: In the wheat field, after Superman brings Ricky, the upper sleeve from the pullover tied around Lana's neck changes size after Superman leaves.
Continuity mistake: After Superman fixes the oil tanker and touching the oil soaked steel, he waves goodbye to the sailors and his hands are clean.
Continuity mistake: A thief comes out of the Century Savings Bank, but the money bag he holds reads Metropolis Bank.
Continuity mistake: From the inside, the sign on Archibald Data Processing has a square thing on top of the first and last letters. From the outside it doesn't.
Continuity mistake: When the roller-skate girl grabs the trolley, the cups and food on the upper plate fall. A frame later they're all back on.
Continuity mistake: When the roller-skate girl grabs the trolley. In the close ups she is bending to the front, in the wide ones standing straight.
Continuity mistake: When Superman first pulls the stack down to use as a slide for the workers, the bottom where it came out of the roof was a dark color. When the people go to slide down, it's all silver colored.
Answer: The only reason that Gus was working with Ross, Vera and Lorelei was because he stole money from the company he worked at. To avoid going to prison, Gus was forced to do anything that they wanted. After realizing that his computer was designed to do anything it was ordered to, including killing Superman, Gus removed a small screw which shut down the power momentarily but, after the computer brought itself back online, Gus attempted to destroy it with an axe to save Superman. Superman saw this and realised he was wrong about Gus and after the computer was destroyed decided to help Gus find a job.
That makes sense, thank you! Been bugging me for years.
Jen Hen
You're welcome.