Just recently married, my wife and I were visiting my parents' house. It was around 9:30 pm in the fall so it was completely dark outside. I went outside in the back yard by myself and jumped on the trampoline for maybe 15 minutes or so.
Before heading inside, I laid down on the trampoline to stare up at the starry sky. As I was laying there, I noticed something flying from over the house towards the backyard I was in. It was much darker than the sky so it was easy to make out. It seemed about human sized and was about 150 feet up. All of this happened very rapidly. It looked like it was just going to pass right over me and keep going...
As I was seeing it, I was telling myself that it must have been an owl. However, when it got to right above my position it seemed to stop. It then began coming down closer at me. I was completely frozen in fear. As it came down, I could see it seemed to be very billowy. Imagine the Grimm Reaper and his old and tattered cloak. I was shocked and unable to move and was just staring at this thing coming down towards me. It probably got about halfway to me before I snapped out of it and jumped up off the trampoline and ran inside the house.
This was about 10 years ago. I asked my wife last night what she remembers from that night after I went in the house. She said I came running in the house looking completely pale. I told her what I saw and was then very quiet the rest of the night... Probably processing what I had seen. I am still frightened to go outside by myself when it's dark outside. When I do I am always looking up to make sure nothing is there.