To give you perspective: this little moment is set from Elphaba's second 'bring me down' to the last note of Defying Gravity, just before it all goes black.
* * *
"Elphie?" Glinda tried, as she leaned out of the highest window in the wizard's tower. "I changed my mind! Take me with you!"
She found it futile, of course. Madam Morrible's use of the words 'wicked witch' had gotten the crowd so frenzified
that they drowned her out.
And then in a bright, blinding flash of white; Elphaba disappeared with an echoing cry of victory.