My grandmother, who was 97, was in a rest home. I decided to sleep in my guest bedroom one night. In the middle of the night I woke up holding a stuffed Minnie mouse doll and then I saw an image of a ghost passing into heaven perhaps im not sure. The next day I learned that my grandmother died the night before, as if I knew it was going to happen and I wanted to wish her a fond farewell. There is studies in chaos theory that its possible to calculate the future like sometimes I get strings of dejavu really bad that could be why certain humans have predispositions and end up being right some sort of calculation in our brain.