Revealing mistake: Evil Superman supposedly holds Clark by the back of his shirt, but what we really see is his hand behind the back and not holding anything, or at most a part of a dummy which was superimposed with Christopher Reeve.
Revealing mistake: As Evil Superman quips to Clark about wanting to fly, as he struggles Clark's left shoulder goes a little transparent, showing his image was superimposed over the stunt actor.
Revealing mistake: When Clark's sneeze launches the bowling ball, the ball casts no shadow, revealing it's a superimposed image.
Revealing mistake: When the firemen's truck runs out of water there's a close-up of the level meter and it reads "Pierreville fire trucks Ltd. Camions a incendie" revealing the scene was shot in Canada.
Answer: For one, when a commodity like oil is in short supply and the demand is high, the price rises significantly.
raywest ★