Calvin is learning the lesson the French learned the hard way at the Maginot Line in 1940 - better to be mobile, Calvin, especially when fighting Hobbes!
Good use of rhyme for a six-year old, isn’t it? And spot on with the allusion to “The Cask of Amontillado” - though without the merciful torch at the end… Is Calvin crueler than Poe?!?
They’re probably used to it by now and have learnt to tune it out.