Well, I don't subscribe to the "orb" theory...but, we have seen a specter of a woman looking down at us from the second floor windows...the curtain moved and it motioned like it was closing the shutters...WE couldn't sleep after that. We heard a door slam, there wasn't a breeze it was a still, humid and hot night. What a rush that was...
I've been to G'Burg 30 times or so, including several at night. I never saw or felt anything. But my wife completely wigged out one time in broad daylight near the Peach Orchard. She just made a running break for the car in the middle of a trivial conversation. She said later that she was overcome with an overwhelming sense of imminent death.
My 1st experience was at Pea Ridge. The Elkhorn Tavern. It functioned as a hospital during the battle and hundreds of soldiers from both sides died there. I accompanied a ranger on his rounds one evening. At the tavern he punched the fire watch clock and made sure all the doors inside were locked and then locked the outside doors. We then went to the next four or five stations and then found ourselves back at the tavern. When he unlocked the front door and we went inside I saw that all the inside doors were standing open. It was also noticably colder inside than out. I could feel the hair on my neck starting to rise. The ranger laughed and said that it happens all the time. I told him I'd had enough of this sort of fun and went back to camp walking fairly fast through the dense forest. Since then I've experienced other things but nothing as startling as Elkhorn Tavern.