Several times throughout the film characters say things when their lips do not move. For example, when Jack is under the bus defusing the bomb, a piece of rubber runs up under his cart. Jack says, "Fuck me!" but his lips do not move.
As Jack is driving his truck up the freeway on ramp, the camera switches to a side on view. Jack sounds his horn several times, but both of his hands remain on the steering wheel. In previous/subsequent shots, when Jack sounds the horn, his hands leave the wheel and press the horn ring inside the steering wheel.
When Payne says to Jack, "Ok, but I want you back *real fast*," what he is actually saying is, "I want you back in 10 minutes." The scene was dubbed to give Jack a little more leeway - he is obviously gone longer than the allotted 10 minutes.
After the discovery of the bomber's identity and place of residence. Jack listens as his partner gives the details then after they hang up the phone, Jack says to himself, "Come on Henry, save my ass," vs "Come on Harry..." The partner's name is Harry, not Henry.
At the beginning of the movie after Jack has hooked up the crane from outside to the lift, there is a shot of the crane outside, and the line going through the vent. If you look closely there is a pipe in front of the vent, yet when the crane goes through the vent, the pipe has vanished.
After the elevator starts from floor 46, we see it from below; the motion of its counterweight, in the foreground, lets us easily see that the speed is somewhat more than one floor per second. The next shot is inside the elevator, where the floor indicator is changing at about half that rate, slower than one floor per second.
As Jack and Harry rush onto the roof, a third arm and gun are briefly visible to the right. This is the arm of a third SWAT team member who has otherwise been completely deleted from the scene and who, as far as the viewer is concerned, isn't there.
The elevator is at or below floor 41 when the first bomb explodes. In a view from above, we see it fall about 12 floors, without sparks. We then see the emergency brakes engage, with lots of sparks. But then an interior shot then shows the elevator passing 35, and indeed, after sliding past several more floors it stops between 29 and 30.
When the passengers are being rescued as the crane that pulls off the roof is wedged near the top of the elevator shaft, the elevator is at floor 23. The roof access is at 53, so there are about 30 floors of cable extended from the crane. But when crane and elevator fall together, as seen inside the elevator shaft, they are only about 15 floors apart, and the cable is only a little bit slack.
Payne picks 46 because, as we see, it's the top floor and Jack will have to get off the roof or be crushed. But a little later, we see from a label on the elevator monitor board that the other police are watching that this elevator's top floor is 52. Possible explanation: to save on multiple tooling costs at the factory, sometimes different elevators may use a "standard" manufactured panel or other part that allows for more possibilities and/or other features that a less "deluxe" elevator model made by the same company might not have. So it's possible that this elevator was smaller (fewer floors) than another elevator that the manufacturer makes, but they just used the bigger panel for this one.
When Jack receives Payne's phone call after the first bus explodes, the bus is on the right-hand side of the road. However when we see Jack and the bus through Payne's window while he is talking, the bus is nearer to Jack on the left hand side of the road.
When Jack and Harry are rescuing the people from the elevator, at one point there are clearly four people in the elevator; two men and two women. A woman gets out and then only one man and one woman are left in the elevator.
Upon pulling the first passenger - the blonde woman - from the elevator, the following passenger - the brunette - can be seen sliding entirely out of the elevator all by herself. Yet, in the next shot, we have a backside angle of her being helped out by Travers.
Shortly after the bus narrowly avoids the dustbin lorry, there is a shot of Jack on the phone to Mac, shown from outside the bus. In the next shot, from the camera inside the bus, he has only just picked the phone up to start the telephone conversation with Mac, when he says "Mac, get me out of here!"
After the bus makes the jump, all the passengers are celebrating. Watch Terry (the young guy). At one point he falls to his knees. Immediately after, the show a different view, and Terry is standing once again, without us seeing him stand up.
When the bus takes the off ramp into the city, it slams into a few cars and if you look clearly when the bus hits a car before plowing through the caution signs, the right front corner of the bus is caved in from the impact. but throughout the movie, the bus seems to be in perfect shape.
The weather changes between shots when the bus is in the city, for instance before the bus goes by the school its a nice sunny day. But the scene before that shot its dark, and looks like its a dark cloudy that's about to rain.
After Jack tried to defuse the bomb under the bus, he punctured the fuel tank. When he told Annie what had happened, the fuel gauge is shown and the needle quickly advanced toward empty. For how much fuel was lost during a very short cut away from the fuel gauge and back to it, it would have emptied out within no more than two minutes. Yet several long minutes went by between the last shot of the fuel gauge and when the bus finally ran out of gas. Possible explanation: The bus might be fairly fuel-efficient, so if there was enough gas in the fuel lines and other fuel system components, it could allow the bus to remain running for a good while even after the tank was empty. Also, if the punctured hole wasn't at the very bottom (lowest point) of the tank (the sending unit might be in a fairly deep "well" at the very bottom of the tank to allow every bit of gas in the tank to be pumped out), then a little gas could still be left even after the gas above the hole had all leaked out.
When Jack is lowered to the fallen elevator, he uses a hook to hold the elevator and as we see that, the hook is facing right, however when the emergency brakes are blown up and the elevator falls, the hook is facing left.
While the news crew is preparing the tape to distract Payne and rescue the passengers, Jack and Annie check the fuel gage and it clearly reads empty. There is no way that a vehicle without gas can still be running. The bus would stop almost instantly and blow up. But, when Jack and Annie are rigging the bus to drive by itself, you can see the fuel gage and it clearly reads full. Where did the fuel come from as the passengers are being transferred to the rescue bus? Possible explanation: The bus might be fairly fuel-efficient, so if there was enough gas in the fuel lines and other fuel system components, it could allow the bus to remain running for a good while even after the tank was empty. Also, if the punctured hole wasn't at the very bottom (lowest point) of the tank (the sending unit might be in a fairly deep "well" at the very bottom of the tank to allow every bit of gas in the tank to be pumped out), then a little gas could still be left even after the gas above the hole had all leaked out.
At the end of the first scene, Jack "shoots the hostage" : Harry get a bullet in the left thigh. Next scene, as we see Harry walk to get his medal, he has a crutch to help him with his right leg. Later on, when he walks out of the bar, we clearly see him limp with the left leg again.
In the airport rescue scene, the rescue bus initially is to the right of the bomb bus. later, we see that when the people are being rescued, it is to the left. then again, in a long shot it again changes position to the right
When Payne leaves Jack behind and takes Annie down to the subway station, he taunts Jack with the detonator. But from then up until Payne handcuffs Annie in the car, no one is holding the detonator. It is nowhere in sight.
Just as the bus is about to jump the unfinished bridge, police lights can be seen reflected in the interior of the bus. However, the police escort has already broken off and the exterior shots show the bus driving by itself.
The freeway that the bus first goes onto is supposed to be I-10, but there is a light rail line down the middle. That makes it I-105, which according to the movie was not yet open at the time the story was taking place.
When on the city streets the TV news reports that the bus is headed South on Western. But after it hits the stroller of cans the bus is seen heading towards Rimpau, which is a North/South street. So the bus is either going East or West, but definitely not North/South.
When Annie is running for the bus, she passes notice boards as such, yet when it cuts to a side shot of Annie at the door to the bus, the massive notice boards have suddenly disappeared and all it is now is bushes and gardens.
Supposedly the bus is traveling in one general direction on the freeway but in actuality they keep passing the same spots on the 105 freeway and changing direction. Sometimes the bus is heading east and sometimes west on the 105.
Shortly after Annie takes control of the bus, if you look out the window in the background when Jack asks her if she can handle it, we can see the bus passing the same truck accident that Jack parked his car in front of when he first spotted the bus.
Several scenes are shown of the bus with its rear doors open while moving. A safety feature does not allow the rear doors of transit buses to open until the bus is at a dead stop, with the brakes applied.
Payne's submachine gun is just a small one with a fairly short magazine that could only hold a maximum of about thirty rounds; there is no way he could have fired that many long bursts before he finally ran out of ammo.
After the first bus blows up, Jack is on the phone with the bomber. The bomber gives Jack a deadline of 11am, after which Jack looks at his watch. The time on Jack's watch shows 8:05, but that's not the time of day. Above the numbers on the watch are the letters AL, which means it's on the Alarm setting. 8:05 is the time the watch alarm was set for, not the time of day.
When Jack first approaches the bus while driving Tuneman's Jag, he yells as loudly as he can to the driver "THERE'S A BOMB ON THE BUS!" The driver can't hear him, even with the window open. He also can't hear Tuneman who is another foot closer. But when Jack maneuvers around to the other side of the bus where the door is, the driver can suddenly hear him clearly say "stay above 50 mph" even though there is now several additional feet separating them and he is not yelling.
Just before the bus gets onto the empty freeway, you can clearly see the bus slamming on its brakes to avoid hitting the slow-moving police car directly in front of it (the front end of the bus dives down). It is obviously no longer going 50 mph as required by the bomber.
After everyone is off the bus, the runaway bus collides into a plane being pulled out of a hanger and explodes. The airport would most likely have been evacuated as soon as a bus carrying a bomb drove onto its runways. No one would be working during that time.
The bus is rear wheel driven. Speedometer is connected to front tires. So when bus takes off into air on freeway, the front wheel should stop spinning in few seconds and bus should have been blown off. The bomb is definitely not judging wind speed. The take off itself of course is another error mentioned already.
When the elderly woman refuses to be helped out of the elevator that is about to drop twenty floors, the floor outside the elevator can be seen through a hole in the bottom left hand corner of the elevator, revealing the fact that it is only one or, at most, two floors up.
Although the last shot from inside the bus before the jump shows the roadway simply ending, once looking from outside the bus we see it run over something just at the end of the road, then rise suddenly above road level. Obviously this is an end view of a ramp.
In a quick shot of the platform truck loaded with police officers riding alongside the bus in an attempt to rescue passengers of the bus, you can clearly tell that the film was undercranked to simulate a higher rate of travel. This is apparent by the unnatural, quick movement of the police officers on the platform truck bed.
The windshield on Tuneman's car is wet when it shows him up close. However it was a sunny day and he had not hit the yellow barrels of water on the freeway. He doesn't hit them until a few scenes later.
In the film it says that Howard Payne was an Atlanta police officer. When he puts on the police uniform it is strangely an LAPD uniform not Atlanta. Possible explanation: Payne was obviously an expert planner, so he would surely have procured an authentic LAPD police uniform so that he could pass for a local officer.
When Harry and his team arrive at the bomber's house, an airplane can be seen taking off in the distance. However, during this time, the bus is driving in circles around the airport runway. All planes would be grounded if a bus carrying a bomb was driving around the runways.
The bus, upon making contact with the cargo plane at the airport, blows up from inside the bus and then spreads to the plane; the bomb was placed under the bus and would have obliterated the bus's chassis completely, yet the bottom half of the bus remains essentially intact.
After the elderly woman is rescued and is being escorted away, she turns and yells, "My shoe!" in reference to her loosing one of her high-heeled shoes. However, she has on two shoes, one black and one skin-toned.
The goof items below may give away important plot points.
Near the end when Payne is talking to Jack on the phone he is seen holding the phone on the left side of his face with his right hand. While he is talking, he snaps his fingers with his other hand, however, this would have been impossible considering he was missing a thumb on that hand.
At the end of the movie, when Annie and Jack are kissing in the destroyed subway train, one of the tourists that almost crashed with their van is taking pictures of the couple with a closed Polaroid camera.
After the passengers get transferred off the bus safely, the tire pops. Annie says "Jack, I can't hold anymore" yet Jack responds "Hold on!" Possible explanation: Jack may have meant, "Hold on a moment as best you can till I can get up there to help you", and he does indeed quickly turn and hurry up to the front and help hold the wheel.
After Jack punctures the bus' fuel tank and is rescued by Ortiz, Annie punches him and asks him, "What's that smell?" Jack tells her, "It's gas," yet the bus is a GMC 'New Look' model which is powered by Detroit Diesel engine.
When the bus is driving by itself, it appears to be driving through a hangar. When the bus enters the hangar, the hangar door is fully open. But when the bus exits the hangar from the other side, in the background you can see the hangar door fully closed.
When Helen tries to get off, Jack moves forward and grabs her left shoulder. After a brief cutaway to Payne, Jack is standing farther back and his hand has not yet reached her shoulder when the bomb under the steps explodes.
Shortly after Jack shoots Harry in the leg and Payne goes to make his mistake, there was originally a scene that showed Jack shooting Payne in the neck. Although this scene was eventually deleted, you can still see the smoke from the shot Jack fired while he watches Payne run into the garage.
As they are attempting to derail the subway, they are hugging around the pole. As the subway tips over in the street. It flashes to them still hugging as the pole breaks and they fall, the pole is behind her (outside of the hug).
In the subway car, the dye bomb inside the money bag explodes and the purple paint sprays all over Payne's face. After that he climbs up on top of the subway car to fight Jack, but during the fight sequence there is no purple paint on his face.
The orientation of the lines of the train roof during the final fight sequence between Jack and Payne. During the fight, Jack is on top of Payne, and Payne tells Jack "Hey, I'll drop the stick boy! You want that?" before smacking Jack in the face with it. From here Payne ends up on top of Jack and smacks him in the face again, here they are laying with the train roof lines going across their bodies. There is a short cut where Payne smashes the back of Jacks head on the roof. Then Payne again smacks Jack in the face with the stick, but despite Jack and Payne not rotating their bodies, they are now laying along the lines.
When the bus enters LAX the right rear tire is torn by the security spikes in the driveway, but does not rupture immediately; we later see it peeling apart as the passengers are retrieved, until it bursts completely and sends the bus lurching to the left, away from the retrieval vehicle, with Jack and Annie still aboard. However, a tire that bursts on the *right* side of a vehicle at high speed will cause that vehicle to skid to the *right*, which in this case is *into* the retrieval vehicle - not away from it. (Of course, it's possible the bus's wild skid to the left is the result of Annie, who is an inexperienced driver, overcompensating - but we don't see even a hint of the fishtail that would produce.)
Subway systems have fail-safe precautions which prevent runaways. This takes the form of a deadman's switch, usually a foot pedal, which requires constant pressure to operate the train. Once the shot trainman's foot came off the pedal, the train should have slowed to a stop.
Jack steps off the moving bus at the airport via the rear doors, since there are no front door steps, and they stay open afterwards until Stephens steps into the opening. Annie could not have operated the door switch as would be done at a normal stop, since this would also have applied the bus's brakes; therefore the doors should close themselves as soon as they are not being held (as we see them do a few minutes later during the setup for evacuating the bus).
When the bus hit the airplane and both blew up, the impact from the blast would easily have also blown up the vehicle pushing the airplane. Yet several moments after the plane and bus blew up, the driver of the vehicle jumped out unscathed and ran for cover.
The plane clearly has no windows along its sides, and yet debris after the explosion seems to include rows of window frames. But most aircraft are designed for both freight and passenger use, and the internal structure of the fuselage includes the window-shaped holes seen in the debris.
Payne clearly doesn't have the dead man's handle in his hands just before and after boarding the subway train. However, since he never said he was intending suicide, he conceivably provided a way to deactivate the trigger; he could have used this and put it in his pocket for this short time when he needed both hands free.
Harry is shot in the leg, and hobbles with a cane at the award ceremony. The next day he is leading the crew that is blown up at Payne's house. He would still be restricted to office duty and not leading that operation. Also, he's not limping in Payne's house.
When Jack saves himself from going under the bus wheels after the mechanic's dolly he's riding under it to try and disarm the bomb goes runaway, he stabs a screwdriver into the fuel tank - this later becomes a plot point as the bus is now running out of fuel. But Jack stuck the screwdriver into the tank fairly high up, and certainly not at, or near, the bottom, so the tank wouldn't leak out completely, only until the level reached the puncture.
When Payne "loses his head" on top of the subway train, the light doesn't get damaged. Possible explanation: perhaps the idea is that the light was a very sturdy solid unit, since it could actually knock someone's head off.
Jack is shown attempting to disarm the bomb from under the bus, having a good two feet of clearance in which to work. Yet, we can clearly see before Jack slides underneath on the wheeled platform that there is nowhere near such room actually available under the bus. Moreover, given this low clearance, it would have been impossible for Jack and Annie to have been able to safely leave the bus this way from the center access panel.