I used to run 16mm, 35mm, and 70mm projectors at theaters all over Seattle. The four-plexes were a bit of a challenge, especially when there was a projection booth far from the others. The best was showing 70mm films with 6-channel sound at the Cinerama theater, and then closing the huge curtains exactly in time with the end of the movie. But then I used my engineering degree and got a job that paid a lot more money.
It’s actually called the Many Worlds Interpretation, not multiple universes, but same idea.