Numerous scholars have spoken of the painful effects of identity confusion in sojourner adjustment. We know that it exists, but how does it occur? The question is not about outcomes or differences, but about understanding the dynamics of the contact process itself. How does contact with a different Other produce identity anxiety for the sojourner? Following an intracultural survey of self-identity formation and maintenance, discussion turns to the intercultural dynamics of self-identity processes. The concept of self-shock is introduced. Selfshock rests on the intimate link between Self, Other, and behaviors. Any situation that alters the meanings for behavior has the potential for hampering the individual's ability to maintain consistent, recognizable self-identities. Confusion is no longer with the Other (culture shock), but rather with the Self (self-shock). Selfshock is the intrusion of inconsistent, conflicting self-images. Three dimensions of self-shock are presented: loss of communication competence vis-a-vis the Self, distorted self-reflections in the responses of Others, and the challenge of changing identity-bound behaviors. From the intercultural communication perspective, self-shock is a double-bind based on behavioral ambiguity: Unshared meanings for behaviors increase one's need to confirm self-identities, however, unshared meanings for behaviors decrease one's ability to do so. The analysis stresses the importance of identity-bound behaviors as well as the need to develop strategies that will enable the sojourners to renegotiate viable identities in the new sociocultural context.