I had a stand in SC on an old tea/rice plantation (now a paper company holding), that was located right along an old dyke, by the old homeplace.

For whatever reason, this stand (ladder stand) would occasionally start shaking violently, almost as if someone was climbing up the ladder. I used to think it was high winds I couldn't hear or see moving the top of the tree... but it was totally still. The ground is fairly moist, and Charleston does sit on a fault line... tremors maybe... I don't know.

I always told guests I brought there that the stand was haunted... and they always came back to the truck white as a sheet!

I honestly just think it was because I had the stand strapped in VERY tight. My very small movements or who knows what might have caused reverbreations in the metal of the stand, sort of like a drum. Freaked me out bad at first, but I shot a heck of a lot of deer out of that stand!