What Is The Creepiest Thing You've Witnessed Alone At Night?

What is the creepiest and most unexplainable paranormal experience you've ever had? Basically a redditor was answering a thread a lot like this one, like “what’s the creepiest thing that’s ever happened to you,” etc. [serious] what is the creepiest or most unexplained thing that’s happened to you that you still think about to this day?

Dec 1, 2022[serious] redditors, what is the absolute creepiest thing that has happened to you that you can’t tell anyone because they wouldn’t believe you?