My sister's car has a ghost she's named George (it's not a very frightening name, hence why she picked it) that appears on occasion, and she's not the only person who's seen him. The first time SHE did she was getting ready to dive out of her car while pulling up to a stop light 'cause she thought there was somebody in her car with her. Then she realised she could see through him, called him George, and went about her buisness mildly freaked out.
She's also worked at a Hallmark that had at least two ghosts/poltergeists that would shuffle the cards where no one was near (The hallmark usually had two girls working, these events happened when both girls were in easy sight of each other (For the most part) with no one being near the sight of the events), footsteps in the store, occasional whispers, figurines jumping off of shelves, and the manager, my sister, and two other girls had their asses pinched.
On a trip home from New Mexico 10-15 years ago, we were driving through a storm (out running a tornado, it was a helluva lot of fun for me, I LOVE storms), when my older brother spotted what he called "Torpedo lightning". It was much like ball lightning, but basically it dropped out of the clouds, hovered in place for a moment, the front half spinning quickly one direction, the other half slowly in the other, then shot across the sky and back into the clouds.
One of my friends lived two houses away from a house that a man killed his family and himself in, no one on that street walked past it on the side walk, everyone would cross the street to get around it. That house was just plain creepy. The blinds would move on occasion, and it's not that there was anyone inside. The place was locked up tight, no broken windows, no nothing. Just over grown grass.
I saw something flying on my way home with my little brother last year that looked exactly like a small dragon. By small, I mean maybe an eight foot wing span, 3-4 foot long tail, long neck with a very distinctly unbirdlike head. Damned near crashed my fuckin' car watchin' the bloody thing as it dove into a field. My brother saw it too, and it wasn't a bird. Everything about it was wrong. Wasn't feathered, wings were more bat-like in shape and construction.
That's 'bout the extent of my paranormal stuff.