Another brick in the Pink Floyd slide...
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My memory is kinda sketchy on this, but I seem to remember an episode of the Twilight Zone titled something like "ear worm."
It was about a specific worm that would eat straight through a brain if it was placed in a person's ear. The story line ended with one individual surviving it only to be told the worm had lain eggs while eating it's way through.
Makes for a good Halloween tale, a trifle late.
ps. Bagster I really enjoyed the Gretta vs Kelly's Hero's meme.