Learning from mistakes and accidents is a good way to keep your spirits and keep moving. A bad fall where you bang your head can either make you feel sorry for yourself or help you learn more about how you move. For example if you slide or jump forward and cling to the footing of the back leg it is possible the tension in the hips will create damage and tear the muscle a little bit. If you learn to do this with move awareness you will learn to relax as you leap over a rock or anything and it will free you further. Another example is falling backwards. If you are told to grab your head to protect it than you might do it when you really fall. It is not always the right thing to do so falling backwards while a person is standing behind you at changing distances will help you learn to adapt and come up with the right answer for that moment. A teacher cannot give from himself if the student is not willing to do the same.