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He said: "Originally, they were much more angry at each other, and truthfully it wasn't working. Originally in this scene, Finn revealed that he was a stormtrooper. And in this scene, she had never heard of Luke Skywalker, which didn't really make sense, because later, she's heard of Han Solo, and she's been wearing the Rebellion helmet, you just didn't quite buy it. But the idea was that her life was so isolated, so sad, so without hope, that the most optimistic thing, that was Luke Skywalker himself, was nothing but a Myth. And the idea is that Finn brings this hope to her. Also this really fun concoction that Finn is lying to her, that his truth that he's actually a stormtrooper is covered up by this lie that he's with the Resistance. That allows for Daisy to sort of fall for this guy that's this daring, brave, good man, but of course he's lying. And she's so lost in her own life that when she hears the name of Luke Skywalker here, she doesn't even believe it's real."
JJ Abrams has talked in the past about re-writing Rey and Finn's relationship: "It was much more contentious. I didn’t direct it right. It was set up all wrong, and when Harrison Ford got injured — which was a very scary day — we ended up having a few weeks off, and it was during that time that I really got to look at what we had done and rewrite quite a bit of that relationship. So when we came back to work again, we actually just reshot from the ground up, those scenes. It was an amazingly helpful thing to get these two characters to where they needed to be."
source: 1, 2
have Harrison Ford's old man bones saved your movie ontd?