This article examines an instance of contained violence during the 2011 riots in London, when Turkish and Kurdish ‘shopkeepers’ in Dalston, East London prevented rioters from entering the area. Introducing a ‘peaks’ and ‘troughs’ approach to the sociological study of violence, the article argues that we need to look at the troughs of non-violence in order to understand the peaks of violence and vice-versa. Based on a small-scale empirical study, this article also shows that contrary to the dominant representation of social actors playing fixed roles during social unrest, we found shifting positions and blurred boundaries in the drama of the 2011 riots. The paper demonstrates that the instance of contained violence in Dalston was informed by three types of reverberations. Firstly, we identified anticipatory reverberations, as the shopkeepers were aware of concurrent events elsewhere in London and, as a result, anticipated rioting in Dalston. Secondly, we saw experiential reverberations, as they used their own experience of unrest in Turkey to inform their behaviour. Finally, the representation of the action of the shopkeepers in traditional and social media may have contributed to the containment of violence elsewhere in England, suggesting representational reverberations.