what the weirdest paranormal experience you had?

We already have a thread for this, just a heads up!
forums.lostmediawiki.com/thread/5385/tell-me-freakiest-dreams

Had to be the time I saw a UFO in the middle of the day. It was spherical and I cant explain it. It cant be a drone because it was to big and had propellers, It cant be a plane because it looked nothing like one. It also slowly zigzagged around the sky slowly unnaturally.

To preface, I don't believe that what we call ghosts are actually some sort of paranormal creature, but simply some sort of natural phenomenon, and we currently don't have the scientific means to explain what those phenomena are just yet.  That being said, I have had a couple of experiences that most people would explain as having occurred because of ghosts.

The first experience was when I was around 8 years old, and at a sleepover at a friend's house.  He had mentioned several times before that he thought his house was haunted, and had seen things like light switches moving on their own, or items in his living room having moved from one spot to another when he was sure no one else had touched those items.  The night that I stayed over, I woke up sometime in the middle of the night to go to the bathroom, and left the bedroom to walk across the living room to said bathroom.  At the other end, next to the fireplace, I saw an all-white figure that looked to be messing with stuff on the mantle above it.  I took one step towards the bathroom, when the figure turned, showed itself to be a woman, smiled at me, and simply disappeared.  I stood staring at the spot she disappeared from for a few seconds, turned around, and went back to bed.  I mentioned it to my friend the next day, he just said, "You believe me now, don't you?" and we never talked about it again.

The second was a few years later, when my family had moved into an old farmhouse.  If you sat in the living room, knowing that no one else was upstairs or otherwise in the house, you could hear young children running around and playing upstairs, complete with footsteps, stomping, furniture moving, and laughing.  Lights would also rapidly turn on and off several times, again when no one else was in the house and you weren't touching any light switches.  This happened nowhere else in the house, and virtually every person that either lived there or visited heard and saw the same things.