Just what type of store were you looking in?
Various convenience stores, but I never ventured to any place big.
So now I sit back with a Nestle Crunch bar and PRETEND it's bubbly chocolate... <sigh>
My buddies and I used to talk about the Mirage bar starting as a solid block of chocolate, then these tiny chocolate miners would chip away at it from the inside creating the bubble-like caverns of delight. (I doubt that's really how they make it, though.)
Dave