Continuity mistake: In the strip club scene, three drinks are ordered by the characters. Later when the waitress comes to put them down, she puts down the second drink at one end of the table and in the next shot Matthew is already touching the glass on the other side of the table. Afterwards, the number and position of the glasses changes frequently between shots.
Continuity mistake: As Klitz and Matthew are running away from Mule, you can see Mule turning the corner and knocks a guy in a red shirt over. The next shot when it shows Klitz and Matthew again Mule has disappeared and everyone behind them have gone from trying to get out of Mule's way to walking along like nothing is happening. (00:55:50)Lummie
Continuity mistake: At the adult convention when Eli and Klitz begin to run from Mule, you can see them run past a gentleman in a red shirt. Mule then pushes this man to the ground, but in the next shot the man is walking again when Eli and Klitz check behind them to see where Mule is. (00:58:05)Conine
Continuity mistake: As the popular kids are speeding past the school security guard, notice the last car a black pick up truck. There are six kids in the back of the truck. In the very next shot you can see there are only two kids in the back. Although one of the kids was crouched in front of the kids that were standing up and might have been obscured from view, the other three were sitting in plain view and have disappeared. (00:08:55)Lummie
Revealing mistake: When Matt is chasing Dannielle's car naked, it is clear that a body double is being used as he is taller and has lighter color hair than Matt.
Continuity mistake: When Danielle and Matthew are sitting in the diner, she draws a picture on a place mat with crayons and then slides it across the table to him. Later in the movie when Matt hands it back to her at the convention, the drawing is larger. Admittedly, the place mat is also twice as wide as it was in the diner, but it should not be.