Dee DeeKoosey, do you notice anything strange? Koosey:What, Dee Dee? Dee Dee:That pile of rocks! We keep passing by it. There it is again! And again... and again! Koosey:Now, now, Dee Dee, that's called a "repeat pan," first implemented by William Hanna and Joseph Barbera in 1947 to streamline production costs. note NOTE: The year is incorrect. Hanna and Barbera were still working on Tom & Jerry at MGM in 1947. They wouldn't develop the streamline production till ten years later, 1957, when they started up their own studio to make cartoons for television. Dee Dee:Well, I don't like it!