I saw a ghost Confederate Civil War Soldier when I went to Adrian College. This one was in Downs Hall, in a tunnel that was used in the Underground Railroad and was "closed". It is filled in at the Theta Chi house, but boards were used at the Downs Hall end. Saw various canned good cans of the Pre-1900's, couple of broken plates, rusted flatware allowed to remain in an untouched state. He was chasing a slave down the steps, tripped and fell on his sabre.
Witnessed a second one sending every instrument bonkers for well over 5 minutes at a time (happened almost nightly) in Cornelius Hall at Adrian College.
Both are well documented Nationally.
Ohhh, you're talking about a movie.