Remember in the mid-90s when people used to synchronize the Pink Floyd album "The Dark Side of the Moon" with the "The Wizard of Oz" and it appeared like the album and the movie corresponded with each other? I was like 'whoa, mind blown!' That's the same reaction I had watching this amazing a capella group perform this stunning medley of popular songs that all relate, in some way, to The Wizard of Oz.