Another late to the party, but I still remember it vividly, tame compared to some of this thread!...my family had just moved to the house I now live in, this is...'86? I think. I was about 11. There's a narrow band of woods between us and the development behind, maybe 100ft wide tops. About 10pm we hear a girl screaming absolute bloody murder from the woods. My Dad was away, so Mom called the cops.
Screaming went on about every 1-2mins for about 20mins. The cops were there within 5 (small town), had multiple officers searching, never found a thing. They told us they had a ton of calls about the screaming. It was never explained.