a bright light caught my eye for some reason and gradually came closer.

I was walking my two dogs around the block.  I saw a bright light.  I thought, after a few minutes, it was a plane because it slowly got closer and brighter.  Then my dogs tried to lay flat on the ground and I found myself trying to hide under trees and bushes.  I don't know why.  This thing I thought was a plane was now gliding right over the top of us.  It was clear, like water, and silent.  Like a big blob, undescribable.  No lights, but you could tell there was a perimeter to this thing, but it was like looking at water.  It was moving very slowly and skimmed over the top of the trees and went on its way.  I don't know how long the whole incident lasted, but I can tell you that from the minute I first saw that light I was almost in a trance.  I couldn't take my eyes off of it.  I ran home after it had passed, called the radio and tv stations and police but nobody else reported seeing anything.  I was probably about 21 at the time.