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: 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.
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)
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.
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)
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)
Audio problem: When the lottery winner is in his apartment he actually puts his hi-fi into "standby" mode when the music starts. You can tell this because the red standby light comes on at the same time as the blue display goes off.
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: After the logs fall off of the trailer at the start you can see the truck jackknife and behind you just see a car flip on its side and exploding without any obstacles near it.
Visible crew/equipment: In the car pileup, as soon as Rory's car flips over you can see the device which flips over his car.
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: 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.