Ass Pull: When Inez walks away into the jungle, she suddenly wears a beautiful white and yellow dress we have never seen before. It seems rather implausible that she had it in her luggage all the time; but it has no bearing on the plot anyway.
Chaotic Evil: Aguirre is a raving lunatic who endlessly dreams up betrayals, executions and incest. Doubles as Stupid Evil, since he is too far gone to even notice his followers dying around him.
Crazy Awesome: Herzog, just for having the guts to do the movie from beginning to end.