"Really, everything's fine out there," Cliona says, as green sparks go whizzing past the window in the compartment door.

Cliona sits back down next to Mary.

Lily leans forward to look around Mary and give Cliona a slightly incredulous look.

"Um, would you like a chocolate frog, Lily?" Glynis asks. "The trolley was here just before you got here."

There's more shouting from the corridor, and then a loud thud like, well, like a petrified student hitting the ground.

"All right," Lily says, standing. "I have to -- Perdita, what are you doing?"

Perdita has stood and pulled down her suitcase, setting it across the space between the seats.

"I was cold," Perdita says, opening the case. "I wanted my jumper."

"What, right now?"

"Just give me a second."

Perdita rummages until she finds a jumper, and then carefully recloses and replaces the suitcase. Slowly.

"Excuse me," Lily says, trying to get past her roommates and stumbling slightly over Glynis' feet.

"Did you just try to trip me, Glynis?"

"Why would I do that?" Glynis asks, eyes wide.

"Oh my God, you're all in on this, aren't you?" Lily says.

"In on what, Lily?" Mary asks, innocently.

Lily rolls her eyes, tightens her grip on her wand, and opens the door leading to the corridor.