At first, Bill thought the grinding noise of the TARDIS was just the ringing in her ears. Then she realized it was her phone - the tone she'd picked for the Doctor (what else would you pick?). She was settled in a safe spot outside of the Welcome Center, waiting to be carted away to the hospital - though she had repeatedly stated she didn't want to go.
She fished her phone out of her pocket and wondered just how long it had been ringing before she answered with, "I'm alive." She lapsed into silence for a brief moment, "Cuts, lots of bruises, possible concussion. I must be fine because it bloody well hurts."