RedactedNarrative: UNITS 1 AND 2 WERE LEAVING THE "LOCAL PUB AND EATERY" AT APPROXIMATELY 2215. UNIT 1 IMPACTED UNIT 2 IN THE CENTER/PORT AND WENT THROUGH UNIT 2 AT AN APPROXIMATE 45 DEGREE ANGLE.  ALL FOUR PASSENGERS ON UNIT 2 WERE EJECTED INTO THE WATER.  UNIT 2 ASSISTED WITH RETRIEVING THE UNIT 2'S PASSENGERS.UNIT 1 THEN ASSISTED UNIT 2 BACK TO THE LANDING AND NOTIFIED EMERGENCY SERVICES.  Operator1 was arrested for BUI.