For all five of you who are wondering, the sound comes from here:
http://www.somethingawful.com/d/flash-tub/super-mario-playset-2.php?page=5
The main part is a Garbage Day parody (ask youtube about that), but click on the 'H' in "THE END" after the movie's done.
If you want to know who the hell Andy is,
http://www.urbanhonking.com/kmikeym/archives/2004/12/on_andy_part_1.html
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