You followed the bartender as he got out from behind the counter, and opened the door to a room where he stored kegs of wine, while going to a cellar door behind one of the kegs. You didn't know why a bartender like him had this, but you did need to know more about the shadowy creature you found outside of the town you entered.
You followed the bartender as he opened the door to the cellar, and you wondered what was down there, while the ladder down to it. Just as you turn around away from the ladder, you spotted a picture equation of a human being, and a horse, as they both equal the shadowy shaped creature you saw. Meaning that the bartender saw it just like you did. "That creature you saw outside of town was known as a centaur, and I shall show you exactly where they're coming from.