Rainbow Cake: Trumped?

Dudes, I just saw this and I think it trumps the Rainbow Cakes Sara and I made.

Um, hello?  Miniature cakes?  With perfectly horizontal rainbow layers?  With buttercream in between?  WHO HAS THAT KIND OF PATIENCE???

The full-size version is impressive, but not nearly as impressive as the minis.  Still, more time than I'm willing to put into a cake, I think.  And I kinda liked our crazy swirly madness, to be honest.  

Also, how the heck did they make those tiny layers?