This is so. fucking. COOL.
Yet another one of the endless treasure cave findings of the old Disney era. Yes, there was a time when Disney actually made lots of truly bizarre, experimental material. And with a budget! Though I've amassed a nerdy collection of some of this old junk, I was not familiar with the release this clip comes from: Mars & Beyond!
I discovered it thanks to the artist Jvstin Bartlett, who posted about it on his evil blog.