Other mistake: The movies show that Superman can talk and live in space as normally as on earth, with no extra effort needed. Therefore, the scene of Superman choking and suffering inside a shield/ bubble with no air is totally senseless. The Krypotnite laser which does choke him appears after he has destroyed the bubble.
Sacha
9th Jul 2011
Superman III (1983)
26th Nov 2010
Superman III (1983)
Other mistake: While on the skiing slope, Gus catches speed and skis away. The problem is he is always on the flat side of the slope, it's impossible to gain speed.