When leaving is right

I think when leaving is right is when your in a bad argument and you know something is going to happen and its going to be bad so i think that will be the right time to leave so you wouldn't be in trouble and that you can save yourself. Another thing you know when leaving is right is probably if your in like the worse relationship and your partner hits on you and tell you that your nothing and worthless but its really hard for you but that will be the right time to know when its time to leave that someone .