“…Important to Pruesse’s description is the impromptu and maybe ephemeral nature of intervention. Currently, urban interventionism has increasing and diversifying prominence with the label applying to a broad array of activities (Brejzek, 2010; Brisman, 2010; Klanten and Huebner, 2010; Young, 2014a). Alongside street installations by ‘traditional’ artists, urban interventionism can also describe the work of graffiti writers and street artists, impromptu street performers, flash mobbers, parkour runners, mass participation cyclists, urban explorers, people who put up ‘guerrilla stickers’, guerrilla gardeners, guerrilla knitters or other urban activist and artistic groups.…”