 The ritual is a temporary enactment of social upheaval via the symbolic storming of the city, remembering ancient rivalries - so ancient, that in fact nobody can tell how exactly did they start.Distinctive black leather hats for the fiesta are worn by some male participants during the ceremonies and the parade.The "San Juan hats" have greatly exaggerated, stiff and circular flat brims that extend over the shoulders and crowns that are high, square, and pointed, bearing many types of symbols.