If only everything were formed of neat laminar flows, with easy to understand conditions, and determinable outcomes: there would be no risk to manage out, messy inconsistencies and uncertainties to disrupt well-laid out plans. Things are not so clear-cut however. Indeed, as scientists, poets and philosophers of science have pointed out it is under conditions of nondeterminism and complexity that everything comes into being. There is an issue, then, when creative disciplines in particular find such complexity problematic enough to design systems and models in which uncertainty, disruption and aleatory collisions are if not destroyed, then dampened. We wonder: what might become of a creative practice that championed its encounter with The Swerve, Lucretius's clinamen? This article examines the role, value and applicability of the concept of collision to design. It takes a philosophical approach to examining this concept and mapping the possibilities of its use in design. We will argue using concepts mainly from Lucretius and Serres – but also Deleuze and others – that collision is an important aspect of all creativity, and that there would be nothing were it not for collisions, disruptive deviation and swerves from equilibrium. The aim will be to articulate the conditions for the possibility of designing that is a 'fan of collisions'.