Photographer Carl Wu sped down a Tribeca street in energetic pursuit of the 46-year-old actress when he lost control of his bike and crashed into her. Kidman, wearing a grey dress and heels, tumbled over onto the sidewalk.
She yelled "Oh, my god!" and "Ow, ow" after the fall, but darted straight into the hotel.
TMZ reported that the actress intended to press charges, but authorities said they would ticket Wu and had no plans to arrest him.
"An accident's an accident," as one officer put it.