Stephen King homages in Wicked?

Maybe I’m too much of a geek, but I just saw Wicked (touring production not on Broadway…grrrrrrrrrr) last nite (the guy who played Larry in Three’s Company played the Wizard) I was wondering if anyone else noticed two Stephen King homages…the bit with Elphaba getting mad reminded me of Carrie/Firestarter, and of course the bit at the Oz Dust Ballroom when Elphaba walks into the Ballroom and everyone points and laughs at her.