Most “ghosts” seem to be associated with particularly famous or traumatic past events. It’s rare to have people claiming to have seen, for instance, the ghosts of a gaggle of bureaucrats heading out to lunch in DC.
I’ve often thought it may turn out that particulary traumatic events somehow reverberate in time, leading to the occasional visual hint of an event that occurred well prior, or an individual no longer alive.
Most are likely just the wishful thinking of a particularly active imagination, though.
Thanks RC.
I can't and won't definitively say it was a, "ghost," but that would certainly be the easiest explanation.
I do believe that just as some people seem to have pre-cognitive abilities, seeing events before they occur, some people may have post-cognitive insights that could reveal some after image of events that had already taken place.