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)
Revealing mistake: When the officer is looking at the pictures of the Flight 180 survivors and their deaths afterward, notice that Todd is shown still struggling at the ropes and looking into the camera. Apparently the media thought it would be better to take a picture of Todd as he was committing "suicide". A similar incident occurs with the bus accident picture. The girl is obviously splattered in the first movie, but appears to have mostly leg damage in the pics.
Factual error: When the surviving state trooper is searching the police database for Alex Browning the search results pop up in a new window although the box that says "Open in new window" is unchecked.
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)
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)
Visible crew/equipment: When the remaining characters are driving away following the van collision incident, Kimberly is seen to be having a second premonition involving the lake. As she is choking she lets go of the steering wheel, causing the car to swerve violently. In the shot where we see the car front-on, it looks like the cop character was actually a stunt driver in complete control of the van.
Revealing mistake: During the beginning crash sequence, you can see the tubes that fire a log in order to flip the cars. When the Mustang flips, you can see the flame from the charge in the tube. The red SUV has a visible flip tube as well.
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)