A movie doesn't come all on one big reel. It comes on a few. So someone has to be there to switch the projectors, at the exact moment that one reel ends and the next one begins. If you look for them, you can see little dots, come into the upper right corner of the screen. That's the cue for a changeover. He flips the projectors, movie keeps right on going and nobody in the audience has any idea.
00:32:34