if you do find yourself in a dangerous situation where you are being threatened, try and diffuse it. That is, try not to make the situation worse by getting angry or trying to fight. The best defense is to remove yourself completely from the situation. Calmly walk away if you can, but if you feel you have to run away, then that's what you should do, as fast as you can. if all else fails and physical force is your only choice, then you must fight back. However, the only way to do this effectively is to use the moves you have learnt in a self-defense class. A good self-defense instructor will teach you how to escape an attacker's grasp and how to disable or distract him long enough for you to escape.