At 10:05 PM. I was walking towards the Space mountain ride at Disneyland in Anaheim Ca. My son in law ask what is that and pointed at the sky. I looked up and a black ring was in the sky. I had look in that directions a few minutes before and nothing was there. We watched it for 4 mins with my son in law taking Pictures. It looked like a large black smoke ring and slowly faded away. It was not effected by the wind or atmosphere. We were al a little scared. No one could figure out what it was. It slowly just faded away. I know a large crowd saw this and took pictures of it.