Actually, I didn't see one, but had a REALLY strange experience once. In 1984, My girlfriend, a buddy, and myself were sitting in her room talking and had her radio on the floor next to us. She was telling us that when her house was built, a worker died because he fell off the roof (2 story house). Her and her family had seen many many strange things in that house. Just then her radio dial zoomed from one end of the dial to the other, stopping on a different station. Remember, this was before digital radios. It had the old dial that you had to spin with your thumb. We looked at each other and ran out of the house.
TPBM has a good ghost story.