One day, someone found that 9V batteries have AAA size cells in them. This was sometime around 1960 or so. Almost 47 years later, someone decided to pop open a 6V Lantern Battery and discovered smaller batteries inside, and not just a mass of blindness causing toxic gunk. These batteries are likely of a completely useless size, although some claim that a profitable manufacturer placed over $15 in AA sized cells inside a $6 battery. FAIL.
It's uncertain whether this is in itself amazing, or the fact that someone managed to purchase a 6v Lantern Battery in the year 2007 is so amazing that it overshadows the original act of amazement.
The only manufacturer known to actively market products at a blatant loss is Sony, and I haven't seen any 6V Lantern Batteries with their name on them.
There is also a nice post that uncovers this hoax with actual science, and not just common sense.