All this is being observed by secret agent XK150 (Robert Towne) who is part of the crew, though is pretty clueless. Renzo schemes to get the boat caught on the rocks so he can get the loot. However, he didn't plan on there being a real monster...
This is pretty strange stuff, an obvious parody but the problem is that it just isn't very funny. The best humour is provided by sardonic moll Mary-Bell (Betsy Jones-Moreland), plus also the sheer ridiculousness of the monster. There is also a gang member who brays like a animal instead of speaking. Very weird.