Frank Zappa - "A Tunnel Into Muck" lyrics

[John:] Maybe the kayak is just a big worm [Monica:] I found that to be a possibility [Spider:] The worms stop in the tunnels sometimes [John:] Where are the tunnels? [Spider:] They're in the muck [John:] In the muck? [Spider:] Yeah, you saw the muck [John:] But, you know, whenever I try to tunnel into muck, it always collapses on me