Other mistake: Sal says he never was in an airplane. So, how did he get to Vietnam?
Dog Day Afternoon (1975)
1 other mistake - chronological order
Directed by: Sidney Lumet
Starring: Al Pacino, Carol Kane, John Cazale, Penelope Allen, Beulah Garrick, Sully Boyar
Continuity mistake: Just after Sonny says, of Sal, that "that man bites" a potted plant seems to disappear then reappear from the counter. Sonny and the head cashier are moving down the counter getting the cash from each position as they go and, if you look at the signs on the counter, you can see that some shots are shown out of order; there are some shots of "Maria"'s position (no plant) interleaved with the previous position (with a plant). But the end effect is the same - appearing and disappearing plant. (00:12:20)
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
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.