Death is the cease of existence in the physical world. Death can happen in two ways, sudden or slow. Even though sudden death causes higher shock reaction for those who knew who died. Slow death sometimes causes the dying person to die in the memories and thoughts of those around them before their actual own death. The brain gives up from the continuing tragedy and would like to move on. It is a coping mechanism to focus on oneself. Because, that self is also one day sooner or later will follow.