One of the first ever technical horror movies. While the term "horror" until the 30's, this can be considered one of the first of the genre. Hard to say if this or A Nightmare is the first film, but they do both use the same kind of jump cuts, and special props. Georges Melies is honestly crazy talented of an illusionist. I more or less covered this in my review for his film A Nightmare, but it is just so fun to see how some talents that are viewed as just basic nowadays were first ever developed.