[ ask, and ye shall likely receive... a pretty good sandwich. if he had the means to make one. ]

Well... I apologize if what I am about to say alarms you, but I've learned firsthand that the dimensions of this shop extend far beyond what should be possible.

[ he turns here, to point at the back wall. ]

No matter how long one might walk towards it, that back wall remains perpetually out of reach. In other words, it is likely a safety hazard to head too far inside.