Tora Ziyal wrote:
The first couple minutes of Harry Potter and the Deathly Hallows, Part 1, especially Hermione's "obliviating" herself from her parents' memories.
I know there was really no time for it, but that was a scene that was crying out to be mirrored with a reversal where Hermione returned her parents memories. Even a mention would have worked. "I've got to go fix my parents memories."