Harry Potter: 10 Evil Acts Committed By Gryffindors

During her tyrannical regime as headmistress of Hogwarts, Professor Umbridge founded the Inquisitorial Squad – a group made up of Slytherins who were given the power to dock points from other students.

Graham Montague – who had a reputation for being an aggressive Quidditch player – became a member of this nasty group. But when he tried to take points from Fred and George, the twins hurled him headfirst into a vanishing cabinet on the first floor. Whilst this may seem like a bit of harmless fun, Montague was trapped for a full day inside the cabinet, and could easily have died of starvation or thirst if he’d been trapped longer.

In the end, he managed to Apparate into a toilet on the fourth floor. As funny as this may sound, the consequences of Fred and George’s actions might have been much worse had Montague been unable to free himself.