Winky the house elf
She was thinking about her ex and hiding her face behind the magizene but was so distracted that she didn't know what she was doing
She was sleeping and somone turned it over to make her look dumb
Mcgonagall: Horse Ginny: Hare Hemione: Cat Luna:Terrier
Luna: Stag Hemione: Horse Mcgonagall: Phoinix Ginny:Terrier
Ginny: Horse Mcgonagall: Cat Luna: Hare Hemione:Otter
Hermione: Stag Luna: Horse Ginny: Phoinix Mcgonagall: Otter
He was holding on to a root with his foot when Sirius pulled him into the tunnel.
Sirius snapped it with his teeth.
The Whomping Willow hit it.