Now, this will make your skin crawl.
Walt Disney's "The Skeleton Dance" was the initial entry in the Silly Symphonies series, and the biggest surprise, perhaps, is that acclaimed composer Carl Stalling, better known for his work at WB, not only composed most of the music for this short, but came up with the basic idea! Scope!
Elements of "Skeleton Dance" would later be reused in the Mickey Mouse short, "Haunted House", which apparently was also released in 1929. Hmmm.