In The Holiday, after Cameron Diaz and Jude Law sleep together, it cuts to them lyinig in bed next to each other. Diaz is wearing a white bra. While the camera is looking over her shoulder, the strap is falling off of her shoulder, but when it is looking over Law's shoulder, the strap is on top of the shoulder. The angle changes back and forth a few times, and and each time the strap magically changes position. At the end of the scene, we see Diaz fix the strap, so its obviously was meant to be off her shoulder, but when they filmed the one angle, they forgot about it.