Continuity mistake: At the end of the movie in the scene where Moose and Sophie kiss, Moose's hat keeps changing forward to backward from shot to shot.
Continuity mistake: Tris tries to seduce Nick at the river by dancing in front of the headlights of his car. He decides to abandon her, and backs the car away. When he cranks the steering wheel clockwise and points the car up river to leave, the camera cuts to a shot of Tris standing by the river, but the headlights are still on her.
Continuity mistake: When the van stops and Fish's body is sent flying away, the position of his body on the ground differs between shots.
Continuity mistake: When she goes to sing "Nobody's Perfect," she has on a white tank top, a blue jean vest, and a watch. As she starts to sing, she only has the white tank top on, and no vest or watch. Then again throughout the song, she has the vest and watch back on.
Continuity mistake: In the scene where the drama teacher is in the copy shop trying to decide what color paper to buy, his hand keeps moving between shots. Every time the shot is from the copy shop side of the counter, the drama teacher's right hand is in front of the blue paper. But every time the shot is from the drama teacher's side of the counter, his right hand is in front of the orange paper.