Talk:Twilight Sparkle/@comment-4604642-20140320110949/@comment-32136229-20140320111526

I'm pretty sure it means that she finally finished the first draft of an episode, which she found to be "both immensely satisfying" (because she finished the first draft) and "mind-numbingly terrifying" (because she knows it's going to go through multiple changes, considering it's the first draft).