Barricade is the Decepticon who disguises himself as a police car in Transformers, the 2007 live action film directed by Michael Bay. His transformation scenes helped define the movie series sound for robots changing form, mixing computer generated movement with dense mechanical audio. Clips of those moments later circulated widely on soundboards and in fan videos, where the effect became shorthand for any dramatic machine reveal. It remains popular because few other transformation sounds convey the same scale, detail and menace in just a few seconds.