There's lost of ghost stories about civil war locations, I would consider myself a scientist, but the fact of the matter is no one can explain what ghosts are. Yes of course it's possible that it was some sort of nightmare, but there is a lot of things science can still not definitively prove or disprove. People have the believe that "scientists" (whatever that term means) have an answer for everything, when in fact pretty much all scientific beliefs come down to one simple question: Is it testable? Unfortunately it's kind of hard to ask a "ghost" to show up when you have all your equipment set up (if in fact there truly is any devices that can accurately detect a ghost's prescence), then have him come back a few more times to make sure you results are reliable. Does this mean that ghosts don't exist and ALL these people who report incidences are lying? Of course not, these people saw whatever they saw and their perceptions are real to them. I cannot support nor disprove their reports, but nonetheless SOMETHING did happen.
ANYWAY, that's a cool story, I probably would have wet my pants at that age !