Tom and Jerry began as an MGM animated series created by William Hanna and Joseph Barbera in 1940, and its opening music became closely tied to the franchise across decades of shorts and TV broadcasts. Online, the intro is widely used in nostalgic edits and in videos that set up an inevitable chase, much like a cartoon chase. Its lasting appeal comes from instant recognition: a few seconds of the opening can make ordinary footage feel like classic slapstick.