What are some examples of foreshadowing in musical Wicked?

If you don't mind some spoilers, I will tell you the ones I have found.

1. When Elphaba has a vision in "The Wizard and I" she says "I swear someday there'll be a celebration throughout Oz that's all to do with me" and that celebration she foresees is the Ozians celebrating her death.

2. Also in "the wizard and I", there is the line "I'd be so happy I could melt". I think that one is self-explanatory for anybody who has seen/read The Wizard of Oz.

3. In "Dancing through Life" Fiyero sings "life is painless for the brainless".He himself becomes brainless when he becomes the Scarecrow.

These are the ones I have figured out on my own, but I know there are many more examples!