When Chuck slaps Ariel to the ground, she lands slightly ahead of the right side of his black pickup truck. In the next shot when Chuck is driving away, Ariel is on the ground directly next to the truck, and further away.
During the final dance scene, towards the end of the dance, Rusty can be seen already in the background wearing Willard's black cowboy hat. However, in the very next shot, Willard puts his black cowboy hat onto Rusty's head.
When Ren leaves the principal's office he gets in his VW beetle and drives off in a temper. There is no boot lid/engine cover on the car at that point but when he pulls into the warehouse seconds later, there is a boot lid complete with number plate.
At the beginning of the town hall meeting, the meeting is called to order with three raps of the gavel. According to Robert's Rules of Order, a guide for meeting room procedure, meetings are to be called to order by two raps of the gavel.
When Ren is pulled over and his license is being examined by the police, his license is an Over-21 Massachusetts license. The difference between Under-21 and Over-21 is that Under-21 licenses are vertical and Over-21 licenses are horizontal.