Well I think Emma didn’t have much choice, but if they’re implying Regina had time to change, that makes no sense. They all ran from the cave to the docks. Then if its magic, it makes even less sense she’d magic up THAT.
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“If I had a world of my own, everything would be nonsense. Nothing would be what it is, because everything would be what it isn't. And contrary wise, what is, it wouldn't be. And what it wouldn't be, it would. You see?” -- Lewis Carroll, Alice's Adventures in Wonderland & Through the Looking-Glass