Bubbles

I think we all see the world from our own little unique bubble.

~ Julie Taymor

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Except Glinda. She has a big-a** bubble. She can ride around in it like a car. Or like the invisible jet Wonder Woman drives. 

(pause)

I bet Glinda and Wonder Woman are related. They both have invisible transportation, the both drive invisible vehicles, and they both know "how to keep young in spite of the many years [they] have lived"- at least that is what L. Frank Baum wrote of Glinda. Also true of Wonder Woman.

Additionally, Glinda's last name is Carter.