In solo improvisation practice, I always have at least 3 partners to work with:
1) my body — the kinesthetic sensations that occur inside of me;
2) my mind — the mental activity generated from my present moment experience: thoughts, attitudes, judgments, analysis, etc.;
3) the room — the improvisation itself.
After some years of practice, you begin to realize that there isn’t a place for “I don’t know” to exist. There always is a something. Believing that there is “nothing” is choosing to believe the mind’s judgment of the moment is more important than the present experience of the experience. Artaud said something similar to “The problem with man is that he looked out at emptiness and saw nothing when the space was full.” This is exactly what my negative-thinking mind tries to do inside of an on-going improvisation: it tries very hard to find “nothing” in the emptiness when the emptiness is full. It is the discipline of remembering to change focus, to question the authority of the mind, that brings me back to the body experience. The body experience is a never-ending flow of sensations that is constantly giving me information. To treat that as nothing is a lie. It’s where the harvest comes from.