In the episode where the priestess kidsanps Prue and marries her to a demon. The one where Pheobe and Piper are turned evil. In the scene where the Priestess steals the Book of Shadows there is a part where she goes flying across the room. As she lands you can see the bottom of her shoes and can clearly tell she is wearing work type boots with a rubber tread on the bottom. The camera than moves away and back and she is wearing healed boots. Now I can understand why the stunt double would want to wear treaded boots, but I don't think you should be able to see them