In the first season of Charmed, there was an episode called "Dream Sorcerer". In this episode, Prue rejects a guy at Quake and he foes after her in her dreams. When she falls asleep in her bathtub, the dream sorcerer takes a sponge and rubs it down Prue's LEFT SHOULDER. When she reveals the wounds to her sisters, however, the scratches had magically moved to her RIGHT SHOULDER. How is that possible?