Character mistake: The guy on TV says all of the flight 180 survivors have died. That's incorrect as Clear is still alive and a main character of this film. (00:02:05)
Revealing mistake: When the camera shows the coffee cup in the cop's car, you can see the ignition is in the off position (00:09:16)
Continuity mistake: In the beginning pileup, when the red SUV starts to flip, the front passenger wheel and suspension are ripped off and go off toward the front of the car. Yet, in the next shot, the car has all four wheels. After it shows the Trans Am going in the ditch, it shows the same shot of the wheel coming off from a different angle. (00:11:10)
Visible crew/equipment: After Kimberley's premonition she sees the truck zooming past her car and starts yelling. When you see an unusual expression on Sheena's face when the camera view is in the car look closely in the right side mirror you can see a boom mic in the reflection. (00:14:50)
Continuity mistake: When you see Detective Sueby looking through the glass wall look extremely carefully at Kat's reflection on the glass,she is just about to stand up from her chair.In the very next shot you see that only a second later Kat gets up from her chair a second time. (00:18:50)
Revealing mistake: When Evan slips and falls on his back, you can see the 'ground' vibrates right when Evan's body hits it. With that amount of impact, a concrete ground wouldn't visibly vibrate like that. Of course the filmmaker wouldn't let the actor fall on something concrete for safety. (00:25:55)
Continuity mistake: When Todd dies in part 1, his eyes are severely bloodshot from the strangulation. Yet when Officer Burke is looking at his picture on the computer, they are normal. (00:26:50)
Continuity mistake: When the dentist starts operating Tim's teeth with the noisy device, the dentist's left hand (holding a dentist's mirror) is on the right side of Tim's face. In another shot, his left hand with the dentist's mirror is on the other side and the position keeps changing between shots. (00:41:10)
Visible crew/equipment: When Timmy gets killed by the falling plate glass watch carefully and you will see the foam representation spring back up. (00:41:20)
Revealing mistake: When Nora's son gets killed, we can see the boy under the falling piece of glass. But in the shot where this piece is just about to smash him, you can see on the DVD edition that there is a dummy instead of him because his arms are too long relatively to the whole body and also the hands are obviously not human. (00:41:20)
Revealing mistake: When Tim runs into the pigeons and the glass falls: when it crushes him, you can see the arm bend backwards, same with his hand. When he gets snapped in half, the blood is water with some red food coloring stuff, not real blood. It is obvious that Tim is a rubber dummy. (00:43:09)
Visible crew/equipment: At the gas station when the cop is talking, the camera pans by him quickly but for a second you can see the cameraman reflected in a metal part of the gas pump. (00:46:30)
Continuity mistake: After Clear and Eugene's deaths Kimberley stares out at the lake and the white van outside the hospital, when Tom grabs her and says,'What are you talking about?', she looks over Tom's shoulder and she sees a newspaper report. You see it has two lines for the headline with a blue sheet of paper above it. In the next close up shot of the report it has one line for the headline and the blue paper is lower down. (01:16:25)
Factual error: In the final scene where the gas grill blows up, the arm that falls to the table in front of the mother is not from a teenager - it is nearly twice as large as the young man's arms (as previously seen in multiple scenes). Some people say it's a leg, but if that's so it's a bit odd having fingers on the right side of it... (01:25:11)
Continuity mistake: When the lottery winner is going to die, the beer bottle he takes out of the fridge moves all over the place. It even vanishes a couple of times.
Factual error: When Kat is driving the survivors and they crash into the field, they slow to a stop while spinning - there is no way the car would travel backwards with the speed that it appears to in the next shot.