30 It is common ground that the appellant and his female partner, Ms Maes, were engaging in disorderly conduct at the junction of Leister Avenue and Fitzgerald Street, Geraldton. They were abusing each other. Constable Dean, who was on duty nearby, was alerted to the disturbance and attended the scene. He tried to calm things down by standing between the appellant and Ms Maes. Constable Dean's evidence was that he was telling the appellant to calm down, but the appellant did not listen and continued to abuse Ms Maes. Constable Dean informed the appellant that he was under arrest. The appellant denies hearing this. The appellant commenced to walk off. Constable Dean took hold of the appellant's left arm. The appellant swung around with a raised fist. Constable Dean said in his evidence that he thought the appellant was going to hit him. In response, Constable Dean said he took hold of the appellant's arm, kicked his feet away from him and the appellant fell onto the ground on his back. Whilst on the ground, the appellant struggled. The appellant's evidence was that he struggled because he was concerned for a neck injury he had suffered in April 2009. The neck injury was described as a compression fracture of the C5 vertebra. The appellant underwent operative treatment, but had, after a period of being off work, returned to full-time employment. In cross-examination, the appellant said that Constable Dean was hurting the appellant's neck immediately after the appellant hit the ground and that the appellant attempted to get back to his feet, as he was fearful of further injury to his neck (15 March 2011, ts 30 - 31).