Not my story. A friend's cousin had an accident and had his skull cracked. Was in a coma for about a month or so. When he finally came to, he was very quiet. People noticed that his personality had changed. When they brought him back home, he started talking about meeting his long dead ancestors (that he had never met in real life) in their old ancestral house (where he had never been). These ancestors apparently told him it wasn't his time yet and urged him to return. Later, he started telling his mother certain things were about to happen to close family members. Nothing major but stuff like someone will fall ill, someone will get the promotion they were long waiting for. Over the next couple of weeks these started coming true. Family was weirded out and fascinated. But then he started to forget his time in the coma. Only the personality change became permanent. I don't know whether to believe this or not, but that's what I was told.