In this commentary building on Philip Ringstrom's paper, I address how improvisation, an unpremeditated spontaneous activity emerging within an interactive context, can be analytic even when not shaped consciously by the analyst's reflective capacity and therapeutic judgment. A microanalysis of the nonverbal dimensions of the analytic exchanges that Ringstrom offers is used to illustrate how affective experience can be attended and coconstructed on a subsymbolic process register carried on kinesthetic, somatic, and acoustic dimensions that may or may not be transduced to symbolic expression for mutative analytic impact to have occurred. The metaphor of jazz is added to the metaphor of improvisational theater to help elaborate this view.