Good advice generally. Although there are rare very serious cases when even this does not help. There was a mentally ill guy in our primary school who was stron

Good advice generally. Although there are rare very serious cases when even this does not help. There was a mentally ill guy in our primary school who was strong, wild and agressive like an animal. (He has done weight training every day being 11 years old!) He had no respect of his own life, so if someone fought back he would fight until really dangerous levels. The older the guys are the more dangerous this whole thing can get. In an extreme situation the best thing someone can do is to tell everything their parents. The serious bully in our school was first 'met' by the father of a bullied girl and later were fired from the school.