Many people while fighting get aggressive and use the deadly power but according to the law in self defense you can use only the reasonable power in such a way that the opponent will not hurt badly. But if this is required then you have to prove in the court about the situation, if court doesn’t accept your appeal then you can also be treated as the victim.

In self defense don’t ever try to hit your attacker first; in this condition you make the situation more worse. Your first hit makes the attacker defend himself. In some countries “Pre-emptive” self defense is required have the knowledge to act in the first blow of situation when it reached at a point where there is no hope for de-escalation or escape. sante.