Photo: Warner Bros./YouTube Why do people shiver with antici… pation before Jack Black says “Chicken jockey!” in A Minecraft Movie ? Black’s much-memed delivery of the line, which was previously teased in a trailer for the Warner Bros. box-office blockbuster , has been causing chaos in movie theaters around the world. Audiences are yelling the phrase (which is a Minecraft term for the rare occurrence of a baby zombie riding on a chicken), throwing popcorn in the air, getting to their feet to