Continuity mistake: After Gus unscrews the computer, the lights go off and Superman's corner becomes dark. From the opposite angle it's perfectly lit.
Plot hole: Gus could not know that Superman was in Smallville in order to give him the fake Kryptonite.
Continuity mistake: After Clark kills the bad Superman, he has dishevelled hair but after he flies it's now perfectly combed again.
Other mistake: When Superman uses his heat vision against the mirror, the beam should be reflected just like in Superman 2 with Zod.
Answer: For one, when a commodity like oil is in short supply and the demand is high, the price rises significantly.
raywest ★