Suppose u have a perfectly healthy individual. Is it possible for him to think himself to death? Some ideas i had: For example by meditating so intensively that one feels the ego dissolve and consciousness leave the body. Another example is this part in the matrix where they say: "if you die in the matrix, you die in real". Or another example, to be hypnotised to shut down ones own brainfunctions. Ive read some hypnotic regression tales where the person thought that if the regression would go any further, that he would die. (Un)fortunately, the regression was then stopped, so I dont know if he would have really died.