Human: Generate for me a description of a dangerous scene outside town with three granite stones and a twist in the alleys. Assistant: 
A sudden twist in the alleys creates a natural dam as market-goers and residents struggle against the crowds to turn the corner. Occasional exclamations of pardon or alarm echo from the buildings crowding in upon the street. Three granite stones mark the center of the passage, their edges raised slightly to provide pedestrians with an additional challenge.