May Days of Melies - The Infernal Caldron [Le chaudron infernal] (1903)

So much to enjoy and appreciate in this one: the striking colors (especially the flames and demon green), the devilishly macabre subject matter, and the Méliès special effects. The coolest tricks involve fireball spirits that become ash and the use of out-of-focus superimposition to create the most visually-impressive ghosts in film up to this point.

http://www.imdb.com/title/tt0135180/