Visible crew/equipment: Near the beginning where Philo parks his truck after speaking to Orville who is taking Ma to do her driving licence, you can see a crew member (wearing a white cowboy hat and sunglasses) reflected in the side mirror of the truck.
Revealing mistake: When the police officer falls down at the lake and lands face to face with the rattle snake, you can see the glass separating the actor and snake.
Continuity mistake: At the bowling alley, when the girl bowls her first bowl she leaves 6 or 7 pins standing, but her second bowl shows only 3 pins left.
