This generator helps the Dungeon Master turn ordinary player interactions into more flavorful narratives. Perhaps a PC is asking around for information and cause offense because they are of too low social status to engage that person. Perhaps the party shows up at the herbalist shop only to realize it isn't opened yet or the shop is so busy they can't get the clerk's attention. Perhaps they are following tracks but the tracks go through a narrow crevice that not everyone can fit through. 

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Sometimes the generator will spark an idea for the DM on the fly. If it doesn't, just accept it as a sign that the players deserve an easy win.