10 Huge Mistakes Which Doomed Movie Characters

The most heartbreaking aspect of Sirius Black's fate in 2007's Harry Potter and the Order of the Phoenix was the needless nature of his death. Were it not for a terrible mistake made by his own godson, Black may not have ultimately met his end in the bowels of the Ministry of Magic.

It's an absolute clanger of a mistake to boot. After the psychic bond between the Boy Who Lived and Lord Voldemort becomes obvious, Dumbledore has Severus Snape teach Harry Occlumency to shield his mind from the Heir of Slytherin. However, despite being fully aware of the likelihood that Voldemort would try to exploit their connection, Harry merrily charges headfirst into the most obvious of traps after the Dark Lord shows him a fake vision of himself torturing Sirius.

It's a lapse of judgement that costs his godfather's life. After Harry and his friends are ambushed by Death Eaters in the Department of Mysteries, Sirius and other members of the Order of the Phoenix arrive on the scene to save their bumbling young charges. Regrettably, the feel-good factor doesn't last for long - Black is killed by a cackling Bellatrix Lestrange seconds after overpowering Lucius Malfoy.