Half Person Floating - What Is It?

It feels wierd writing about this but here we go. When I was 13 I was with my cousin who also was 13 at the time. We had to go out the front of the house to get a camera from her parent's car. It was about 11pm at night. She was in front of me and started yelling at me as to who that was across the road that's calling us. I couldn't see anyone! When she got to the car she grabbed the camera and then ran straight back past me yelling at me that its behind you.

When I looked behind me and across the road there was this lady with pure white hair up to her waist with only half a body floating towards me. She was also waving at me to come to her. I freaked like my cousin did and bolted inside. When I got to the door I looked back and it was gone. We called our parents and my dad came out and seen nothing.

I see this cousin every five years or so and we still talk about it. I had an empty park across the road so it couldn't have hid in someone's house.

A couple of days later I remember seeing this person sitting in a car and he looked dead, I'm not sure if that has anything to do with the ghost.

What was it that we seen? And I'm 1000% sure it was only half a body and the whiteness of her hair and the half body I will never forget. I can't believe the goose bumps I'm getting writing this.

Please help.