The state of play: incidents, definitions and explanations -- getting started with reversal theory -- New beginnings: a reversal theory view of violence -- The joy of physical contact: sanctioned aggression and violence in sport -- when things turn ugly: unsanctioned aggression and violence -- Taking the hard knocks: children's and youth sort -- Beyond the pale: fan violence and sports riots -- Blood and guts: observing violence in sport -- The final whistle: rounding off.