seem impromptu and routine, but they exhibit an internal, member-produced embodied structure. A line is "witnessably a produced social object;" it is, in Durkheimian terms, a "social fact." Participants' actions as "seeably" what they are (such as occupying a position in a queue) depend upon practices that the participant engages in relation to others' practices in the proximate vicinity. To recognize someone as in a line, or to be seen as "in line" ourselves requires attention to bodily movement and bodily placement in relation to others and to the physical environment that those movements also constitute. This is another sense that we consider the action to be indexical—it is made meaningful in the ways in which it is tied to the situation and the practices of members who produce it. The ethnomethodologist's task becomes one of analyzing how members' ongoing conduct is a constituent aspect of this or that course of action. Such analysis can be applied to any sort of social matter (e.g., being female, following instructions, performing a proof, participating in a conversation). These topics are representative of the kinds of inquiry that ethnomethodology was intended to undertake. In particular, Garfinkel conducted a famous case study on Agnes, a transgender woman in 1967. "Garfinkel view[ed] sexuality as a practical and ongoing accomplishment of members through their practical activities" and focused on how "Agnes 'passed' as a normal female despite the continuous risk that she would be revealed as a transsexual." Breaching experiments According to George Ritzer, a sociologist, Breaching experiments are experiments where "social reality is violated in order to shed light on the methods by which people construct social reality." In Garfinkel's work, Garfinkel encouraged his students to attempt breaching experiments in order to provide examples of basic ethnomethodology. According to Garfinkel, these experiments are important because they help us understand '"the socially standardized and standardizing, 'seen but unnoticed,' expected, background features of everyday scenes.'" He highlights many of these experiments in his books. The following is an example of one of Garfinkel's breaching experiments from his book, Studies in Ethnomethodology. Today, some textbooks in sociology often suggest that breaching experiments are the research method that ethnomethodologists use to explore the social organization of action. However, for Garfinkel breaching experiments mostly are a teaching tool that he describes as "tutorial exercises in Ethnomethodology's Program. Influence on later research A substantial corpus of empirical work has developed exploring