This lists second Rankin/Bass film is easily the saddest of them all; its also one of my absolute favorite films. The Last Unicorn is a truly beautiful film, both visually and thematically, that also doesnt pull any punches when it comes to the scary stuff. I was so scared of the Red Bull when I was a kid that I had to leave the room whenever it showed up. Another film that really excels in the voice acting department; the cast includes a very young Jeff Bridges, Alan Arkin, Mia Farrow, Angela Lansbury, as well as Christopher Lee as the King Haggard: who taught me to fear the Voice of Saruman long before the LOTR films. The film was adapted by the books original author Peter S. Beagle and is now, in my opinion, one of the most underappreciated films of all time. Not many childrens films go this deep into the emotional center of its characters, or gets you to care about them so deeply; and I doubt there are any other kids films that are okay with being this depressing: its a wonderful story thats a bit of a downer. I already covered the Red Bull, thats truly the scariest element in the film, but there are a few other scenes that rank up there on the horror scale boasted by this film. The movie includes a variety of mythical creatures during its run, but aside from the Red Bull the scariest of them by far is the immortal harpy Celaeno, the scene where she murders her captors is terrifying. Theres also a scene thats both funny and strangely scary in which Schmendrick the Magician (Alan Arkin) incorrectly casts a spell and brings an enamored voluptuous tree to life. Unicorn is probably the most obscure film on the list (Ive only ever met one other person in my generation whos seen it), but its absolutely incredible so if you havent seen it yet I highly suggest you track it down.