I once saw a Green Gas circle my head.

It said Short Stories. So i'll keep it short.

I was about 15 years old and I was watching Mcguyver. All the sudden, I looked up to the lamp and I saw this green gas like creature spinning up in the ceiling. It was only for about 30 seconds, but it clearly looked like a toxic gas, bright green and it was circling above my head to the right. it was very fast and then it dissapeared into the air behind the lamps. it looked a lot like slimer from Ghostbusters. I've seen many other ghosts and weird objects in my life, but this one seemed to be more interesting as it had no human form. it moved like water and you could see thru it and almost feel it as being very cold. I have no idea what it was, but it was interesting to see..I was not scared, so I smiled and continued to watch television.