The scene that I would relive in my nightmares repeatedly for years was the one where the protagonist's cursed arm comes to life in the middle of a pitched battle and everyone sets down their arms to watch as he pushes open a big gate or something. The music in this scene is foreboding, solemn, yet energetic, and the visual combined with the music evoked exactly the emotion I'm sure Miyzaki intended: dread at the vastness of the power of nature about which humans know naught, finally revealed in all its terrible horror. The prince's fate as a cursed person is supposed to feel worse than death and this was maybe my first time fully appreciating that concept in my short life, so it was doubly effective.
As the parent of a three year old: what made you break and put those on? (I'm just happy for the existence of Pat and Mat.)
So for Spirited Away I warned them in advance, “It’s got scary parts-for example, her parents get turned into pigs! But it all turns out ok in the end. You’ll have to watch to see how.”
And for “Lupin the Third: The Castle of Cagliostro” something similar: “Just so you know, there’s one part where he gets shot with a gun and blood comes out. But don’t worry he doesn’t die.”