The Following Passage Contains an Argument That Commits at Least

The following passage contains an argument that commits at least one informal fallacy. Name the type of fallacy committed and explain why the passage is an example of that type.
From a B. C. comic strip . . .
B. C.: Bugs. YECHT. Bugs. YAPTH. And more bugs. Bugs in the dirt. Bugs in the trees. Bugs in the flowers. Bugs in the breeze. Thank goodness for rocks, the one thing on the planet that ain't got no bugs. What are you skritching, Peter?
Peter: I am etching in stone a comprehensive plan to solve the social and economic ills of mankind . . . It's got a few bugs in it, but . . .
B. C.: Liverwurst! I bet there ain't no bugs in liverwurst!