About three months ago my mom bought a bag of individually wrapped York peppermint patties one day.
We got close to the bottom of the bag when we found one that seemed rather light.
It was full of air. Okay, normal, but we gave it a little squeeze and it was empty.
It was a tiny foil balloon.
Fail.
We put it up on the fridge with a magnet though. We still haven't opened it.