Not exactly moving "images", but here's a fun example of a physical instantiation of the split-screen technique, using a building's showroom windows as subframes. Improv Everywhere is a group of kindred spirits who perform missions of "organized fun" in NYC, and Look Up More was one of their largest missions:
I was walking through Union Square a few months ago, and something caught my eye. In the window of the new retail store Forever 21, a girl was dancing with wild abandon. It was at night, and she was brightly lit standing next to the store’s mannequins. I stood and watched and laughed... It was amazing how eye-catching her performance had been. I began to look at the building as a whole... I figured if one girl in one window had been so fascinating to look at, it would be incredible to see someone dancing in every single window in the building... The windows provided a perfect stage for a mission. Not only are there so many of them, but they are perfectly situated across the street from one of Manhattan’s largest parks. At any given moment, there are hundreds of people walking through the park and out of its subway station. It should be no problem attracting an audience.
Photo is from seanich's Flickr photoset.