The Hook is a classic example of an urban legend. The basic premise involves a young couple parked at a dark lovers’ lane. The radio plays music as the couple make out. The music is interrupted by an announcer who reports that a serial killer has just escaped an institution which is nearby. The killer has a hook in place of one of his hands. For varying reasons they decide to leave quickly. The legend ends with the discovery of the killer’s hook attached to the outside handle of one of the doors. Many variations include the sound of scraping on the car door. Some legends have the same beginning, but end up with them seeing him first, warning some others, then having him come to their car. They try to escape, but end up with him holding on to the top of the car. It ends with both dying.
— Wikipedia, “The Hook”