7. Don’t be a fraud.

Learned from: The Last Exorcism (2010)

Complex says: Last year’s well-made, found-footage horror film The Last Exorcism features a great performance by Patrick Fabian as the fugazi Reverend Cotton. He’s a sham of an exorcist who hires a film crew to document, and ultimately expose, a bullshit exorcism, though the troubled family thinks he’s legit. In true scary movie fashion, however, the young girl’s possession is no joke; as the proverbial ish hits the fan, Cotton is woefully overmatched. By the end of the movie’s satanic coda, he’s left wishing he’d never tried to punk the sin-loving, red-horned man downstairs. That guy’s not exactly known for his sense of humor.