John Kellas went to a car mechanic complaining that his car's engine was making a squeaking noise. The culprit turned out to be a trapped kitten:
"I said no, no, it must be some engine part - as I could not see any cat. But when I went into town in the afternoon, I was convinced too that I heard something. But every time I stopped the car, I could not hear or see anything.
"I decided to take the vehicle to Farmer Autocare in Perth, but the mechanics couldn't find it either. They were thinking I was taking the mickey out of them, that I was referring to a catalytic converter or something
"Just when they were about to give up, we all heard the kitten. At that point two of the mechanics stripped out the bottom of the car. That was when we saw a couple of little eyes peeking out from the dark corner, looking very terrified.
http://automaticlifestyledispenser.com/2009/04/13/easter-oil-change-trip-results-in-corpse-extraction/
And I forgive you Prof, but only because this story has a happy ending.
That was entirely depressing I'm sure.