Whenever a commercial for anything related to Disney came on TV when I was a kid, it would trigger spasms of glee in yours truly. And these were commercials for things like video tapes or maybe a general commercial related to Walt Disney World in Florida. Nothing like this amazing ad for Space Mountain that they ran in 1977.
Even watching it now, I want to start clapping when they show Space Mountain in silhouette. It just looks so majestic and full of promise.