For some people, this news was too shocking for them. And some fans committed suicide. This suicide was caused by the stress built up inside of them. This is the example of stress of sadness. As in the example, stress can lead people to suicide.
All people are different from each other.
Some people can handle their stress inside, but some others can't handle their stress. Those who can't handle their stress may become mentally sick or, in a bad case, commit suicide. That is the feeling from stress, which is inside of every person. However, most of them are not serious. This was a serious problem for the Japanese community.