On the episode titled Brave New World, Lucas catches up with an old friend named Faith. They play a game of basketball and after they play, they're walking together towards Peyton's car. Almost every time the camera switches from Faith to Lucas, the position of her backpack strap changes. It goes from being across her chest to on one shoulder to back across and so on. It 's incredibly noticeable. I guess the editing team for One Tree Hill isn't the best.