In the opening football scene, when Angus makes a tackle, the football clearly falls to the ground. In the next shot, it is still seen soaring through the air.
After Angus drops Melissa at her house, they are talking. Every time the camera angle changes, his hair is in a different style.
About halfway through the opening credits the boom mic and crew are visible.
When Angus is trying on tuxedos for the prom, when the man brings out the purple tuxedo, from the far view look in the mirror. You can see the camera man.