I was spending the night at my mom's house. Me and my sister stayed up late to talk. I was sitting in a rocking chair in the middle of the living room while she was sitting to the left of me on the couch.
She was telling me stories about being a witch and casting spells. I told her that I didn't really believe in magic spells or things like that. Right after I said that, I felt something light flutter across the top of my hand. I thought it was a moth or bug that had landed on my hand.
I looked down and then there was this black, comet shaped thing. It traveled down the length of my arm and I didn't see it anymore. The only way I can think to describe it is the black smoke like on Harry Potter when the death eaters are flying around. Except this was really small, about as big as a golf ball, but with a tail trailing behind it.
I asked my sister if she saw anything. She said, "While you were talking, this black thing appeared in front of you, went over your hand and down your arm, then went down to the floor and disappeared." I just started to get scared, so I jumped up and sat beside her. But then I started thinking about it touching me, so I decided to wash off my hands, to get rid of that feeling. As I started walking towards the kitchen my hair started to stand up. I turned around and sat down by her again. It was probably one of the scariest thing to happen to me.
I'm new to this site, so I'm not sure how long these posts are supposed to be. I will tell other experiences that I have on a new post. I have had four more experiences at her house.