X would react to the feel of the spell, but there are worse things than feeling an egg smash on the back of your head.

She will remember for next time, though. If there is a next time.

Then she meets Bruce's gaze, holding it for a second before she turns and starts moving again, following the scent trail that Amy left behind her.

"It will be more relevant when we are certain. The light."

And if people thought she moved quietly before, it's got nothing on how quietly she's moving now.

And that may be why, as she moves past him, she says to Scorpius, "Thank you."

Or maybe it's just because they don't have to worry about the birds anymore.