Just as interruption, or as pattern disruption? 

For the first, it’s all about timing. And what makes it work (when it does, it doesn’t always) is the observer sense. What folks watching a scene being played see and know and what folks inside the scene know isn’t 1:1. And sometimes, just as when you’re watching a movie and know the scene is about to end, as an observer in this game you’ll think “this is where it should end, but they’re going to keep talking.” So you end it. 

As pattern disruption, its like that, but on a larger scale. One of the things that dice get used for in a normal game is to keep you from having control over everything, or knowing where everything will go. In this game, even when its your scene and you have narrative control, that can go bye bye in the flash of a card. So you a) have to conceive of if differently and hold it differently and b) everyone can keep things from being too pat. When you get to that point in the game where, like DeVotchKa you already know how this will end, you can disrupt that shit.