Continuity mistake: Dorothy's giant lollipop disappears after the witch appears.
Continuity mistake: When Prof. Marvel holds the photograph, his fingers disappear in the close-up.
Continuity mistake: As the Professor is revealed behind the curtain, his right hand is busily working one of the silver levers. A second later, it's working one of the red levers above the big dial.
Audio problem: When Dorothy first meets the Scarecrow, you hear Scarecrow talk about the directions, but his mouth doesn't move.
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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