The Ghost Train (1903)

This is a "real life trick photo film" that was produced by the American Mutoscope & Biograph Co., the filmmakers working for them who shot this were neither never "credited" or those names were lost to history long before the 1920's.  The was made with a simple reverse negative process to turn an "actualities film" into something spooky.  By some standards it represents an example of American avant-garde in early cinema.