Paranormal Activity---Please Read?

I've had the same thing happen.I was looking outside this winter and it was going along the ditch so I thought it was something weird on a dog leash,until it came in my back yard and was too high to be on a leash and it stayed at the same level as it went down the hill and near my bedroom window then turned and went back.It wasn't a animal or person.I didn't go out to check it out because it was about 17 degrees and I was in my nightie,but with my neighbors light I could tell it wasn't a person.I do however live basically in a marsh or swamp so I ume it may have been some sort of gas.I'm glad I'm not the only one who's seen the lights.