Continuity mistake: In the exterior shot of Sal entering the bank, there is a car parked by the door. In the interior shot, the car is not visible behind Sal. This mistake is reversed half a minute later when Sonny enters the bank. There is no car in the exterior shot, but it can be seen in the interior one. (00:04:00)
Dog Day Afternoon (1975)
Plot summary
Directed by: Sidney Lumet
Starring: Al Pacino, Carol Kane, John Cazale, Penelope Allen, Beulah Garrick, Sully Boyar
Sonny and Sal try to rob a bank, because Sonny needs money for his gay lover who wants a sex change operation.
Unfortunately, the police is alarmed, and it turns into a hostage.
Sonny and Sal try to escape with a jet to foreign countries, but their plan doesn't succeed
More mistakes in Dog Day Afternoon
Sonny: You'd like to kill me? Bet you would.
Sheldon: I wouldn't like to kill you. I will if I have to.
Sonny: It's your job, right? The guy who kills me... I hope he does it because he hates my guts, not because it's his job.
More trivia for Dog Day AfternoonMore questions & answers from Dog Day Afternoon
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Answer: He didn't. He just assumed the cops would try something like that, substituting a cop for the real driver. What he didn't anticpate is that they had substituted cops for everyone around the bus when it arrived, and when he replaced the black driver he would have to (unknowingly) pick a cop, regardless. Incidentally, this part of the story is completely factual, it actually happened that way.