Have you ever had a ghost/unexplainable experience?

[™ Chronic]

Ok it's not mine but close to me. My father in law told us he had a dream in which he was at home in his kitchen and he heard a rap on the window so when he went and looked and saw him self and his brother standing there looking at him. It freaked him out.  2 months later he died and 6 months later his brother died. Coincidence ????