[Young Werther]

Legend has it that a particular member of the Earwig family , (a wormlike insect. check out the picture below), would be placed in an enemy's ear. The worm would then travel to the eardrum and would then begin to eat its way trough the brain until it emerged from the other ear! Quite an excruciating experience, especially if the earwig turned around and retraced its passage!

They are considered garden pests and you can read up on them at

EARWIG!

[wimpycat]

GAAAAACK! Thanks for the link, but...no, thanks!

[KillTime]

There is a Twilight Zone or Hitchcock Presents along those lines with the Earwig eating through to the other side of some guys head, which the man survives. The end of the show has the Doctor giving the poor guy some more bad news: it was a female...and it layed eggs.