Continuity mistake: At the start we see Mia driving a Honda NSX with with the aerial up. Camera changes and the aerial is gone. (00:01:20)
Continuity mistake: When O'Connor blocks the bus on the two-lane highway with his vehicle, the bus swerves around his car towards the shoulder, clips the right rear of the car, and breaks the vehicle's rear window. In the next shot, the bus reverses angles, flips over the left rear of O'Connor's car nearest the center line, becomes airborne, and then rolls over and over down the center of the highway. If it had continued on its initial trajectory, it would have crushed his vehicle and continued onto the shoulder. (00:01:45)
Continuity mistake: When the bus is rolling at the start we see a shot where some windows and yellow foam come flying out of the bus. Camera changes and then we see the bus roll and the windows and foam come out again. (00:01:55)
Continuity mistake: On the train Mia is reading a magazine, Brian takes it off her and she puts her hand on her her chin and keeps it there, in shot, until the camera changes to a closeup of her face. When we see the closeup of her face, her hand is not there. (00:08:00)
Continuity mistake: When the buggy first pulls alongside the train, in the first shot, the train is past the buggy. Camera cuts, and the train is next to the buggy. There is also shot where the buggy is in the sun, but after a cut the train's shadow is over the buggy. (00:09:55)
Continuity mistake: As the cars are being stolen from the train car, they're violently dropped onto the ground, yet they don't have a scratch on them. The best example is the vintage Corvette that Vin Diesel drives out of the train car. The car falls at least 6 feet, landing on the front left corner of the bumper, yet seconds later, the car is in perfect condition. (00:14:40)
Continuity mistake: When the Chief of police asks Hobbs if all this is necessary, Hobbs is looking at the officer. Camera cuts and he is looking at the file. (00:20:20)
Continuity mistake: When Paul and Mia jump off the roof in the favellas, in one shot Mia is in a sitting position in the air with her legs out in front of her. Camera cuts and she's now in a walking position, as if she would land on her feet. (00:33:45)
Continuity mistake: When the translator is saying something doesn't add up, her hand is under the file in one angle but on top in another. (00:35:10)
Continuity mistake: In the scene where Gisele is pointing a gun at Roman, Gisele's finger moves from on the trigger guard to the trigger in different shots. (00:41:25)
Continuity mistake: When Dom and the gang burn all the money, they smash one guy pretty good, broken nose and cuts over his face. When this guy explains what happened to Reyes, there are no marks on his face. (00:49:30)
Continuity mistake: When Roman realises he is going to be the one to go into the police station, he has his arm out to the side. Camera changes and now it is on the desk in front of him. (00:54:20)
Continuity mistake: The hole in the plastic which is around the vault Han ordered changes after Tej says "You got a 100 million dollars in a safe, are you going to put somebody else's handprint on it?" This is easiest to spot around the palm scanner: at first, it is completely free, but after that line, the plastic suddenly hangs in front of it. (01:05:40)
Continuity mistake: In the scene where Hobbs confronts Dominic for the first time at the location where all of the drivers go to race, Hobbs and everyone he is with aim their guns towards Dominic. Officer Neves pulls her gun out as well but when the shot shows the whole group and Dominic says "This is Brazil!", Officer Neves has both of her hands at her sides. Right before it cuts back to her, you can see her start to reach for her gun. But the next shot shows her holding her gun out already, not just pulling it out. (01:11:00)
Continuity mistake: When Han and Gisele obtain Reyes' handprint, Reyes touches Gisele with his left hand. However, later in the film when Tej opens the vault, he uses his right hand. Handprints are not symmetrical so the biometric scanner would have rejected the initial scan until Reyes realized he was using the wrong hand. Even flipping the fabricated handprint over and using his right hand would still deny them access as handprints are not symmetrical. (01:11:02 - 01:56:27)
Continuity mistake: When Hobbs and Dom are fighting, there is a shot where there is a yellow hammer by Hobbs' head, which disappears instantly. (01:32:25)
Continuity mistake: When Hobbs is knocked off his feet by the RPG blast, the amount of dust on his shirt keeps changing. (01:36:15)
Continuity mistake: During the vault chase scene, the vault spins on two separate occasions, tangling the lines in the process. The first time, it is being dragged out of the police station and the second when it destroys half a bank. The lines could not have been untangled, because both times they guys were turning to the right and the vault spins in the same direction. (01:40:30)
Continuity mistake: Throughout the entire vault chase scene, the condition of Dom and Brian's car windows switch between being damaged and perfectly intact. (01:42:20)
Continuity mistake: Throughout the vault scene, the amount of police cars in pursuit is constantly changing. In one shot you have 4 black and white cars and 2 yellow 4x4's. Next shot the 4x4's have gone. (01:45:00)
Answer: Hobbs doesn't see that scene, though he probably does guess part of what happened - ie. that they swapped the vaults. The scene is played as a reveal for us, the audience, to show us how the vault that is supposed to be full of money is now suddenly empty.
roboc