I kid you not, the creepiest thing happened to me (in my 12 year old mind).
Me and my cabin mates were about to go to sleep, when something started knocking on our cabin.
I can't explain it, but there was something out there that was pure malice and horror (in our 12 year old minds. It would always start out the same way, it had the same pattern. It would be spaced out usually 3-5 minutes between eachother.
When we went got the counsellors to check it out, they saw nothing. They heard nothing. But we could hear it on the inside of the room. But they didn't believe me. We checked it out later in the morning, and we found a dead woodpecker outside the wood cabin.