Other mistake: As Superman flies past the subway train, it's obvious that the train is sitting still, as the view of the tunnel shown it is stationary.
Movie Nut
21st Apr 2022
Superman IV: The Quest for Peace (1987)
2nd Oct 2013
Superman IV: The Quest for Peace (1987)
Other mistake: When Lenny has the prison guards locked in the car and is putting the top up, the steering wheel is spinning but the front wheels aren't moving. The amount of revolutions of the steering wheel is mechanically impossible also.