I loved doing the “Continuity Repairs” strips. Rob is Rob McCarthy, creator of Hell on Wheels. Andy is, of course, my husband. These are the actual answers they gave when I asked them these questions. Yes, “DUH! Magic cave!” is a direct quote.
I did write Rob’s dialogue in the last panel. “Answer me that, Mr. Green Lantern!” is a line from that 1970s Green Lantern/Green Arrow comic where an old black man chews out Green Lantern for not doing more to fight racial injustice. I say this a lot.