Defense can only be such as to avert an attack. If he attacks you and hits him, you'll have to prove he threatened you - he attacked. If you hit him from behind, you won't prove it. Call the police. For fun: -DDDDDD How to call the police when you are old and can't handle yourself? Jirka Kuřátko, already an elderly gentleman from Zdice, went to bed in the evening when his wife tells him, Jirka, it's shining in the shed .. You probably forgot to go out there! Jirka sees from the bedroom that his wife is right and wants to go out. But he notices that there are actually thieves and that they are stealing his things. He called the police, where they asked him if he had anyone in the house. Jirka said no, someone was just stealing his shed. The policeman, on the other hand, replied that he did not currently have anyone to come. "Lock your barracks, and someone will come when he's free." Jirka said well. He sat down and counted to thirty. And then he called the police again, "Good evening, I called a moment ago that I had thieves in the shed. Don't worry about it anymore, I shot them both" and hung up. Within three minutes, three cars full of police officers skidded, a helicopter circled overhead, and an ambulance drove past. The thieves were caught in the act and arrested immediately! The chief says to Jirka: "I thought you said you shot them ?!" Jirka replied to the chief: "I thought again that you said you had no one free ...!"