I know a kid who routinely got into scraps with his Dad, he would have been about 15-16. One day like any other he left his house with a gash down his face, when we asked what had happened he said that he had gotten into a fight with his Dad and given him a bit of a pasting. We asked if his Dad had scratched his face to which he replied no, that was my mum trying to defend him.................so I sparked her out too.