This is taken from Fantasia (1940), and it is part of the last segment entitled "Night on Bald Mountain." It tells the tale of darkness being defeated by light - It begins with Modest Mussorgsky's (1839-1881) "Night on Bald Mountain" composition, filled with ghosts, ghouls, demons and witches terrorizing a small mountain town by night, and the then trandsitioning into "Ave Maria" at sun up, where the forces of the good and holy banish the demons of the night. Considering it was made by Disney in 1940, the beginning is pretty dark and, for kids, pretty scary.
Now, since it's 31 Days of Halloween, I am just playing the Mussorgsky half and omitting the Ave Maria (beautiful though it is). So, on to the spooky and scary 1940s Night on Bald Mountain!