In the very beginning, when Jimmy Olsen drops his camera the Turtle that comes and grabs it and destroys it is clearly NOT a sea Turtle but a Giant land Tortoise as noted by its arched bulbous shell, Sea Turtles have flatter more hydrodynamic shells, and the fact that it had clawed round feet rather than flippers for swimming.
At the end where Lex escapes in the Helicopter is pure comic book fantasy as modern helicopters take several minutes to power up from dead stop to being able to take off. Even those designed for emergency take off still take at least 1 minute before they can take off.
When Lois Lane sneaks into Lex Luthors secret compound,she is wearing her trademark short skirt and high heels.Since she would not want to make noise while looking around,it makes no sense that she didn't remove her shoes.