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Late Saturday night and throughout Sunday, police squared off with Occupy Portland protestors while attempting to enforce Mayor Sam Adams’ 12:01 a.m. Sunday deadline for protestors to vacate the two downtown parks they have occupied since early October. Approximately 5,000 people showed up to defy the mayor’s orders, overwhelming police until Sunday afternoon when police were able to clear the parks and dismantle tents and other structures. Police arrested at least 50, used pepper spray on at least one person, but largely the protestors were nonviolent. Police, mounted on horses, charged the crowd on one occasion in an attempt to break up the thousands of people that had filled downtown streets and blocked traffic. A protestor who was later arrested threw a firework at the mounted police, startling their horses amidst the chaos and causing one officer to be lightly injured.