u drink cows milk - unlawful act - dangerous - causation - mens rea
unlawful act - civil wrong is not sufficient (franklin) - must be a criminal act (lamb) - must be a physical act (lowe)
dangerous - objective test (church) - can be a chain of events (larkin) (mitchell) - act doesn't need to be aimed at a person (goodfellow) - risk of harm must be physical (dawson)
objective act - (church) sober and reasonable person must see a risk of some harm