The destruction of the wall proved to be something of a straw and camel’s back situation. See, when the mine was originally built, its founders were rather new to their craft and weren’t exactly thinking too intensely about structural integrity when they built the dome-like structure of the room. Granted, such a design was generally a good idea, but it was poorly executed. Succeeding generations of miners had, however, improved its safety somewhat. The diamond dogs, however, thought those shiny metal supports and bolts could be put to better use elsewhere. Why go through tunnel CA to get to section Delta? Why not simply just dig a shortcut through that sidewall over there? Integrity? Pah! We’re diamond dogs, we know what we’re doing. Hmm, you know, this place would look good with a skylight. We’ll get to work on that after dinner.