Kristopher Reisz said this quote

“ Gilly had decided that this was a dream. The Witches' Carnival didn't exist in the real world. And the Gilly who existed in the real world was not brave or cunning enough to have done everything that she'd done in the past day. The real Gilly was not beautiful enough to be lying in bed beside a woman like Maggie. Gilly had decided this was a dream, and also that she'd let that real Gilly, deep asleep somewhere in the outskirts of Birmingham, wither away and never wake up.Already, Gilly could see herself arcing across the earth bright as a comet, moving too fast for the Ashleys and Tracyes, the thousand tiny insults and humiliations of the waking world, to ever catch. ”