RedactedNarrative: While at rest vessel was drifting and operator was retrieving his line in the bow when he was knocked off by vessel 2 which ran up vessel 1's stern. Vessel 1 starboard engine was knocked out and cracked the bracket. Vessel 2 kept going until vessel 1 operator came alongside and yelled at vessel 2 operator to stop. Vessel 2 then took off to Sheepshead bay.