Bang! Out of the corner of my eye, I managed to see where the blast came from: A riot policeman fired something from the balcony of Mong Kok Police Station. Someone screamed. Adrenaline flushed through my body as I began to run away with the masses. “Everyone, c’mon, retreat in an orderly fashion!” one ostensibly seasoned protester shouted, trying to prevent a stampede on Hong Kong’s cramped sidewalks.