Continuity mistake: When Wayne and Garth are on their way to the Alice Cooper concert they show the car from behind you can clearly see that Garth is driving and Wayne is in the passenger seat but when they cut back to the car from inside Wayne is driving and Garth is in the passenger seat. (00:56:50)
Continuity mistake: When Frank's dad is cutting mushrooms while cooking dinner, he slices a mushroom in a closeup. In the next shot, the mushroom is whole again.
Continuity mistake: When the choir are singing the first song that Deloris helps them with, Sister Mary Robert gains confidence and sings louder. Toward the end of the song, she puts her hands together in a praying gesture while she is singing loudly, but in the next shot her arms are by her side.
Continuity mistake: In the scene where the brothers are sitting at the bar, Cesar lights up a cigarette and is holding it in his right hand. The shot cuts as he slaps Nestor on the shoulder with his right hand and the cigarette is magically in his left hand.