For the others sharp finger jabs, one finger fists and spear hands can all be used. It is also the bone that CPR instructors warn you about. If struck with any real pressure or force it can break off and cause injury to a person. Besides the pain, there is also the possibility of puncturing a lung. At the same time, straight in, powerful strikes can cause the assailant to have the wind knocked out of him, pain and even be stunned.
Possible strikes are most kicks, knees, palm heel strikes, forward punches and elbows.
This is the highly sensitive area of the upper, inside thigh and halfway to the knee. There are a large number of nerves that make it an ideal area for strikes. Pinches, certain punches and several kicks can be used to cause pain and even numbing of the leg. Have him come up behind you and grab you in a bear hug. After he thinks he has you well in hand, move your hips slightly to one side and reach back with a hand and pinch an inch.