From the article:
When we went to our seats, the wait staff let us know that despite the fact that the previews were playing, we wouldn’t know until the movie actually started whether we could see the film or not. If it didn’t work, the screen would just turn black. Luckily, the film went through without a hitch.
I agree that moving to digital saved so much time, and I’ll never miss brainwraps or thrown platters… but working booth shifts threading projectors were some of the happiest times I had running theaters.