How do Ouija boards work? People sit around a board with letters and numbers on it, all touching a legged planchette that can slide around on the board. They pretend that spectral forces are moving the planchette around to spell messages. What's happening is that, at any given moment, someone is guiding the planchette, and the point is to make sure that the planchette always appears to everyone else to be moving under its own power.
Taking this idea to role-playing, the deluded notion is that Right to Dream play will yield Story Now play without any specific attention on anyone's part to do so. The primary issue is to maintain the facade that "No one guides the planchette!" The participants must be devoted to the notion that stories don't need authors; they emerge from some ineffable confluence of Exploration per se. It's kind of a weird Illusionism perpetrated on one another, with everyone putting enormous value on maintaining the Black Curtain between them and everyone else. Typically, groups who play this way have been together for a very long time.
A form of Illusionism practiced among all the participants upon one another to conceal both Step On Up and Story Now priorities from one another. Term coined by Ron Edwards; see Narrativism: Story Now