'Optimal experience' is not my word. It was explained by Mihaly Csikszentmihalyi (never pronounce correctly.. :-) ) with the concept of
flow, "the state in which people are so involved in an activity that nothing else seems to matter; the experience itself is so enjoyable that people will do it even at great cost, for the sheer sake of doing it." As Mihaly already pointed out that his finding about the state of optimal experience that was based on the ESM (Experience Sampling Method) was quite similar to the zen practice. Fully enjoying what we are doing at the moment and be aware of what is happening around us.... It is like when my mind and body are harmonized and nothing separates between me and the universe....
I feel lucky that I am a dancer and I am able to experience 'flow' through dance. When I'm fully engaged what I am doing in space and time, I just becoming myself. My full energy is reshaped into the form of movement in space... and I communicate with myself, others and the world. I have been involved in the collaborative projects where improvisation is crucial. I really enjoy the improvisation because I can feel the moment, fully engage in what I am doing, and feel the dynamic energy around me. I don't need to too much worry about the steps as I used to do. Just let me be flexible and open my six senses to the world.