Continuity mistake: When the logs fall off from the truck trailer bed you can see there are no other cars on the highway, apart from the victims', and when it changes to the next shot during the scene there are the same amount of cars on the road as there were before the logs fell off.
Continuity mistake: When Kat is trapped in her car by the log, she pulls out a cigarette and starts smoking. When the worker tries to pry off the door, she says "Could you put it on quiet mode?" and turns away, her cigarette looks completely new. But then five seconds later after her airbag goes off and kills her, her hand drops to the side of the car, but her cigarette is considerably shorter (about half it's length) than it was five second ago. Surely she wasn't able to smoke it all in the amount of time that progressed?
Continuity mistake: During the premonition where the Mustang flips and lands next to the log where the motorcyclist is lying; he is parallel to the road facing oncoming traffic, yet he gets T-boned by the big truck when he should have gotten hit head on.
Continuity mistake: During the premonition when the girl on the chopper shows her boobs, the guy on the left gives the joint to the other one, however in the next shot, he is holding it again.
Continuity mistake: During the premonition where the Mustang flips you can see the left rear wheel center cap disappear and reappear.
Continuity mistake: When they crash in the SUV, the piece of wood in the car changes in length and shape.
Continuity mistake: Look at the newspaper photo of Clear before she committed herself - she has relatively dark hair. Definately not a natural blonde. Yet current Clear has much, much lighter blonde hair. We saw that she was blonde at the end of Final Destination - yet, her darker roots aren't particularly prominent, showing that during her time in the institution she must have bleached her hair at least once. For someone who's paranoid about death, she sure doesn't seem to care about the potentially acidic effect of having peroxide on her head. [Someone asks this in the commentary on the DVD, and the response is "she was a natural blonde, she dyed her hair brown in the first movie." This stands up, as it explains why there were no brown roots at the end of the first movie.]
Continuity mistake: After Evan turns on the stove, the camera switches shots and the flame is gone, then the shot switches, and it is back again.
Continuity mistake: At the beginning of the film, when Kimberly has the pile-up premonition, her red truck flips over a few times; watch closely and you will see that in some shots there's no one in it.
Continuity mistake: During the beginning, the main character tunes a radio to 104.9 to hear the announcement about the vigil. When she tries the radio again after seeing her death, she tunes to 98.9. The same audio plays.
Continuity mistake: When Evan knocks the skillet off the stove, the grate falls. After he gets his hand free, it's back on the stove.
Continuity mistake: Evan throws spaghetti out the window and a few are stuck to the pan. They disappear seconds later.
Continuity mistake: Isabella's photo that they look up on the computer is in her jail cell, which comes later in the film.
Continuity mistake: When all the survivors are leaving the police station, you can see their reflections in the two-way mirror. Before they cut to they mirror, Timmy's mom says, "Let's go" and starts to get up. But in the reflection, she is still sitting. Cut back to them and she is just getting up again. Also in the reflection, the young lady who was on her cell phone in the crash is getting up to leave; then they cut to the group and she is getting up again.
Chosen answer: Eugene's death had no clues I know of, but Clear and Rory's did, Rory's clue was with Nora's. The trophy's shadow is segmented, giving it a divided look, Rory ends up divided to pieces by the barbed fence. As for Clear, Bludworth hints at it with his comment "such fire you have now".