Her blouse

Ginny let out a squeal and dived right, where her blouse was flying away upwards. She grabbed hold of it with both hands, but it continued to try and fly away. Behind her, the skirt slid along the floor and disappeared behind some furniture.

"Help!" Ginny cried, now on tiptoes as she tried to pull the blouse back down.

"The ****-eaters won't give you any help." Hermione stated matter-of-factly.

Ginny's toes skidded on the floor as her blouse continued to try and escape, but suddenly Ginny had a bigger problem - with a twanging noise, she suddenly felt her breasts released from confinement as her bra strap snapped and she saw the garment jump forward and bare her nipples.

"Please, help!" Ginny cried to the room at large.