I saw a very unpleasant situation escalating outside my house some years ago. A young couple were arguing - he was waving his arms about, shouting in her face, and then to my alarm he tried to push her into his car. I rang 999, as I was alone in the house, kept watching and gave them the car number and descriptions. The argument continued, and then the police arrived fortunately. They sat him in their car and a policewoman talked to the girl. I like to think I would have gone out to help her, however angry the other person, had the police not arrived. They later rang and said it was a 'domestic' and that he had been given some useful advice. I do hope so.