Hmmm...is it the little ducks in Roller Coaster Tycoon where if you click on them they quack? It sounds a lot like that to me....
I know I've heard that quack before though...
Edit: I'm bored, so I've been playing with this thing incessantly, speeding it up, slowing it down, and reversing it. It is definately not backwards in the Open Door clip. Just sped up and distorted in some other way, somehow. I'll play with the pitch.
...I love Audacity.
