For both patient and analyst, the waiting room serves containing and expressive functions. The waiting room may serve as both a boundary between the analytic couple and a bridge to engagement. At times it can provide a means of titrating the intensity and duration of the affects activated by immersion in the analytic process: it can also serve to extend the boundaries of the analytic frame by providing a holding environment to facilitate metabolizing the impact of comings and goings. It also may be viewed as a membrane between self-states through which oscillating facets of dissociated or unformulated experience are enacted. Clinical material from the analysis of an adolescent girl illustrates these ideas.