Yes, actually! I did have some really weird things happen after his passing.
The first and weirdest one happened one night when I was taking a walk. I set out on my walk during the day, at around 6.00 PM. This was the summer so it was still light out. I was listening to Michael during the course of my 3 hour walk. I was really sad and I needed to take a walk to clear my mind. His singing really helped me feel better and I thought about him as I walked.
When I was about to come back home, I decided on a whim to go to the store and buy something to drink because I was a bit thirsty. I don't drive so I walked to the store. By this time, it was around 9.00 and it was dark outside. I walked to the store, still listening to Michael. As I was walking, however, I felt that someone was following me. I kept walking but I still had that weird feeling.
I turned around to see who was behind me, thinking that perhaps someone was about to mug me or something (which would be weird because I don't live in that kind of area, but you never know...) and when I turned around I saw Michael. I still remember quite vividly what he looked like. He looked like early 90's Michael, with the hair tied back. He was wearing this outfit, actually:
http://mjjgallery.free.fr/dangerous/tour/billiejean/001.jpg
What I remember the most, though, is him looking really sad. He wasn't frowning--in fact, he was almost expressionless-- but those eyes with that haunting look he has, they looked so sad.
Well, I certainly did not expect to see him and you can imagine the shock I underwent when I was confronted with him instead of some schmoe. I gasped out of shock and blinked, but he was gone by that time. That scared the living s--t out of me!!! D:
When I turned forward to go, some guy who was carrying his groceries looked just as shocked. I don't know if that was more a result of my gasping or if he saw the exact same thing I had just seen. I didn't want to find out, since he would probably think I was crazy anyway.
That wraps up the only time I have ever seen a ghost, if that's what it was.