One injury that the majority of people are usually afraid of is the Skull Fracture, which is a result of a serious break in your skull. A brute force is required to fracture a skull, but once it occurs, it is very difficult to heal and can cause complications to yoru brain, vessles, and the membrane protecting your brain. Following this injury, there is another one that is similar but also can be pretty frightening to deal with, and that is the Diffuse Axonal Injury. This is caused by intense movement in your head, which causes your brain to rattle around in your skull which runs the high risk of tearing the connections to your brain. These tears could be either small or large, but each one can lead you down the same path, and that is fatal brain damage, so if this ever occurs, seek medical help as soon as possible.