“The Grinder” is a short story written by Matthew C. Funk in 2012. In the story we hear about some boys who are visiting an abandoned flea market where Joey, one of the main characters, are the first one to notice a grinder.
Very fast, the boys are trying to get Del, the most insecure boy, to put his hand in the grinder. Joey is Del's brother, and he is using their father’s voice to manipulate Del to obey his and the other boys’ orders, and after being pressed he puts his hand in to the grinder.
Joey accidentally starts the grinder, and Del starts screaming. The other boys including Joey run away. After an hour Joey decides to find an adult who can help Del. He finds his way out to the road, and a man stops the car.