" We’re supposed to practice the Cruciatus Curse on people who’ve earned detentions--”
“What?”
Harry, Ron, and Hermione’s untied voices echoed up and down the passage.
“Yeah,” said Neville. “That’s how I got this one,” he pointed at a particularly deep dash in his cheek, “I refused to do it. Some people are into it, though; Crabbe and Goyle love it. First time they’ve ever been top in anything, I expect. "
― J.K. Rowling , Harry Potter and the Deathly Hallows (Harry Potter, #7)