The only “trick” is that this preparation seems so boring, so impossibly tedious, that when we see the effect we can’t imagine that anyone would do something so

The only “trick” is that this preparation seems so boring, so impossibly tedious, that when we see the effect we can’t imagine that anyone would do something so tedious just for this simple effect. Even magicians who know many tricks will still enjoy the show and appreciate the effort. Prestige is a great movie about this very topic.