This paper studies parsing as a practice used in mobile instruction. The findings build on ethnomethodological conversation analysis and on observations made on video data that have been collected from three settings: skiing, driving a car and flying a plane. In the data, novice learners are instructed by more experienced instructors to accomplish variousmobile tasks. The paper shows how instructors use parsing to guide learners to carry out, step-by-step, the sub-actions that the ongoing mobile task (e.g. turning, landing) is composed of. The paper argues that parsing is a practice employed by instructors to highlight the sub-actions of a mobile task. Instructors may also use parsing to orientlearners to emergent problems to do with the timing, quality and order of the sub-actions in the performance of a complex mobile task. Finally, the paper shows that sometimes there is not enough time to parse an ongoing task, in which case the parsing can be carried out afterwards.