When we lived in our old house, I was lying in bed one night and heard what I thought was an owl, but it was a tremendously loud "hoot," so I wasn't sure. I hopped out of bed and took a peek out the window to see what I could see. There was a bit of moonlight, but as I looked around I couldn't see anything out of the ordinary.
Until I looked directly across from me, to the top of my neighbor's chimney, about fifteen feet away. There was the biggest fucking bird I've ever seen in my life sitting on the chimney staring back at me. Imagine a two foot tall bird with eyes like this:
Staring at you. At midnight.
I screamed like a woman.