Visible crew/equipment: While Moretti is in the barber shop on the phone with Sonny, the camera tracks closer to Moretti, Sheldon, and Carmine, and as Moretti says, "Come on, let's be reasonable...just give me your name," we can see their three T-marks (dark chalk) on the floor at their feet. (00:28:40)
Visible crew/equipment: When Sonny wants to use a heavy desk to block the bank's back door, Mulvaney removes his suit jacket, and as they both push the desk toward the door, the outline of the actor's Lavalier mic transmitter is visible at the lower right side of Mulvaney's back. (00:24:15)
Visible crew/equipment: When Leon is brought to the scene from the hospital and escorted toward the barber shop across the street from the bank, Sonny shouts, "Hey, Leon! Over here!" In the next shot facing the crowd around Leon, the moving reflection of the production's huge camera crane becomes visible in the window at the right side of the screen. (01:05:00)
Continuity mistake: When Mulvaney is about to open the vault with his spot key, which would trip an alarm, Sonny takes the keys away from him. In the close-up facing Sonny, he's holding the keys up in his raised left hand, but in the next wide shot from behind Sonny, he's holding the gun up with his left hand as he declares, "No games, all right?" Then, in the next close-up, the keys are back in Sonny's raised left hand. (00:09:50)
Visible crew/equipment: When Stevie gives Sonny the handgun, as Sonny tucks the handgun into his waistband, the actor's mic wire becomes visible. After Moretti's first phone call, Sonny is angry that "Jack downtown" gave him wrong information, and when he stands up there's an odd bulge at the back of his pants, presumably his mic transmitter. Then Sonny asks Mulvaney about the back door's location, and when Sonny leans down to tell Sal, "Cover them, cover them," we can see the mic and its wire between Al Pacino's tie and shirt. In exterior shots, we can see the outline of the white tape under Pacino's shirt (holds his lav mic in place due to the actor's frenetic movements). (00:07:55 - 00:20:40)
Continuity mistake: At Margaret's desk in the bank, her name is spelled "Margret" on the name plaque prop, but at the end of the film, her name is spelled "Margaret" in the credits. (00:51:10 - 02:03:25)
Continuity mistake: In the scene in which they discuss Sylvia smoking, the paper on the table is different between shots. In the shots of Sylvia there is some paper near the can on the left. In the shots of Sal, the paper is not there. (01:03:00)
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)
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)
Continuity mistake: When the head cashier voluntarily goes back into the bank with Sonny you can see, reflected in the door of the bank, the FBI man standing next to the door of his car. In the next shot he is standing by the red car that is parked behind his. (00:37:05)
Continuity mistake: When Moretti is talking to Leon in the barbers' shop, Leon's hands change position between shots. For example, when Moretti asks if Leon reported Sonny's abuse to the police, Leon is holding his gown shut with 2 hands, but in the next shot only one. (01:06:45)
Continuity mistake: When Sonny takes his gun out of the long white box, he throws the box cleanly away to his right. There is then a wider angle shot of the bank, and the box is now tangled in the strap of the gun on his left. (00:07:00)
Continuity mistake: When Sonny tells the guard to close the blinds all the other bank employees are lined up against the back wall. A little later, after Sonny has spray painted the CCTV cameras the employees are wandering around in front of the safe and only then does he usher them back against the wall. (00:08:55)
Continuity mistake: At the very beginning of the movie, Sonny walks towards the bank with the box under his arm. The ribbon is on top facing upwards but in the next shot, when Sonny enters the bank, the box and the ribbon are now on the side. (00:04:32)
Other mistake: Sal says he never was in an airplane. So, how did he get to Vietnam?
Answer: Because Sal was in the bank with his gun.