Someone attacked himself from behind.

The first step is to avoid being attacked from behind. You can feel others approaching by listening to footsteps and looking at shadows.

If the neck or head has been caught, there are many ways to break free. Introduce some simple methods. The first one is to break the opponent's little finger, and it is best to break it hard. Secondly, you can let the opponent slack off by hitting the ball, so as to find a chance to break free. For example, stepping on toes, kicking the crotch, cutting the crotch with a hand knife, etc.

If the other person locks you with his arm (for example, naked), there is no solution if he is locked. Only when he locks you up. The arm lock is relatively close, and you can attack the abdomen with your elbow, or you can use the above-mentioned hitting method. You can also lower your center of gravity or even drag him to the ground and break free by rolling.