I once unwittingly brought firecrackers on a plane. No one else noticed, either, fortunately. Pétard translates to firecracker, and although these are made of primarily chocolate,
the brown paper strip to the upper left of the chocolate is a firecracker strip. You pull both ends and it makes a loud snap!
I remember bringing a bag of these long ago to Texas and being proud because I knew that papillion (see the bag above) meant butterfly. How well informed I was!
If ignorace is bliss, I've been truly blissful at times during my nearly eight years here...