This article investigates how a significant part of the learning process within show dance classes is performed, namely multimodal demonstrations. In particular, it focuses on how the mirror is used as a tool during demonstrations. The data consist of video recordings and ethnographic fieldwork among young adults practicing show dance. Three single cases undergo in-depth analysis using an EMCA (ethnomethodology conversation analysis) approach. The analysis shows that the understanding of a multimodal demonstration is watched into being and that the mirror functions as an extension of the teacher. In addition, the use of the mirror changes over the course of the ongoing demonstration. The participants agree on how to use the mirror and that there is a symmetrical order for how the mirror is used, which means that the responding participant follows the way of using (or not using) the mirror that is introduced by another participant. As such, this article contends that use of the mirror is a well-established practice. The article concludes by highlighting the positive effect on the learning situation when a mirror is used for demonstration in show dance classes.