Continuity mistake: In the opening football scene, when Angus makes a tackle, the football clearly falls to the ground. In the next shot, however, it is seen soaring through the air.
Continuity mistake: At the end when they are at the dance, Troy (the redhead) has a broken arm. Yet when he goes to give Angus a high 5 and he hits the quarterback (I forget his name) he has a full arm extension with the same broken arm. Then in the next scene he has a broken arm again.