Talk:Twilight Sparkle/@comment-4604642-20140304123451/@comment-5837525-20140305065617

She didn't think Celestia was dead (at least that's not how I interpreted it). She cried over the fact Luna became Nightmare Moon again and Celestia was hurt because of it. She didn't realize she was in the past until after that. Zecora never specified what the potion would do, only that Twilight would find out "why the sky is day and night" after drinking it.

And the only reason she wasn't as "understanding" as she should've been about staying behind was because (1) she hadn't yet fully grasped her responsibility as princess yet, and (2) she and her friends had overcome a lot together as a team, so imagine how she would feel having to sit on the sidelines.