The first four minutes (or so) of the song is the fun, dark, little
song about the
plight of the carrots. After this ends, there are
about eight minutes of
crickets singing in the background.
Finally, faintly, and about twelve minutes into the track, against the
backdrop of the crickets, you can hear the story about the
psycho with
the knife.
The Tool FAQ and Undertow's liner notes indicate that the story
was actually a message left on Maynard James Keenan's answering
machine by someone called bill the landlord. Tool has a habit of
including answering machine messages on their albums; see also
Message to Harry Manback, Message to Harry Manback II, and
toolshed.down.net.
On a more personal note, disgustipated is not a good track to have
playing on repeat while you sleep. For me, dreams come from it
which defy any attempt at explanation. The cricket song is just
close enough to white noise that the rest of the track really messes
with me while I sleep.