Plot hole: When the Gales' house lands in Munchkinland, Dorothy picks up Toto and glances around the house. She looks right out the window. Wouldn't she have noticed that she wasn't in Kansas then, before she got to the door? (00:19:05)
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Plot hole: At the end of the movie, when Rhett famously leaves Scarlett, she thinks about how she can win him back, and with a smile on her face, says, "After all, tomorrow is another day." Her daughter tragically died a few days before. Scarlett isn't the least bit heartbroken about losing her.