American Graffiti - Both Sides of the Pack of Camel Cigarettes
In a scene where the character John is riding in his car with character Carol (played by MacKenzie Phillips), John has a pack of Camel cigarettes tucked in the left sleeve of his t-shirt (as all the "cool dudes" did in the '50s). Part of the time we see the front of the pack of Camels through his sleeve, and other times we see the back of the pack.
Just a thought, John Milner was smoking cigs all through the movie. Maybe the Camel pack changed because he was constantly pulling out the pack so he could grab a smoke!