Revealing mistake: The Lollipop Guild's bald caps and face makeup to hide them, especially the ones on the sides, are very, very obvious.
Continuity mistake: When Dorothy wakes up, Toto jumps on the bed. She hugs him while he faces the left side, and she says, "Toto, we're home." A shot later, he is facing the right side.
Answer: In all likelihood, probably not. Water is often depicted and represents purity, and cleansing. It flows smoothly, is beautiful, clear, and responsible for life on Earth. Everything the Wicked Witch is not. Where as the good Witch is pure and of a true heart. So it makes sense that something so evil and impure as the evil witch would be effected by the purest substance there is, yet not harm the good witch because she is good.
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