"Ah, guys." Harry interrupted. "Luna just jumped." Jaws dropped as they looked down, and true to his word they could hear Luna's delighted laugh winding back up the pipe, long after her long blonde hair disappeared from sight. With a wide grin promising trouble, Harry winked as he grabbed Hermione's hand and leapt after his friend with a loud hoot of laughter mingling with Hermione's squeal of shock. With a shared shrug, the friends left at the top jumped in after them with their own laughs and screams.