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There is a considerable amount of work on how mobile and (potentially) ubiquitous technologies may be used when ‘on the go’ (REF REF & REF, see also below). So while research focused on human interactions with increasingly mobile and connected technologies has focused on the mobile artefact itself, less has been done to understand how different aspects of basic human mobility might be studied and how such mobilities might play a part in understanding ‘what to build’. In this paper we show examples of how observing and reflecting on walking, as a fundamental activity of everyday life, can support and inspire new ways of thinking about the way in which mobile technologies are designed.   Research question (or approach): to understand the "structure" (bad word) of the experience of walking (the threads of experience, cf. McCarthy & Wright, 2004?) in order to explore walking mobilities and the performance of technology in this most mundane, everyday activity. By approaching walking as a particular (and easy to overlook) way of engagement in the world, our the  aim of this paper  is to