RedactedNarrative: V1 AND V2 WERE BOTH TRAVELLING SOUTH ON THE COLORADO RIVER AFTER LEAVING THE DOCK AT COMMUNITY PARK.  V2 WAS IN FRONT OF V1 WHEN V1 STUCK V2.  V1 WAS TRAVELLING TOO FAST AND FOLLOWING TOO CLOSELY TO STOP.  NEITHER OPERATOR WAS INJURED AND NEITHER WATERCRAFT HAD PASSENGERS.  THERE WERE NO SIGNS OF INTOXICATION FROM EITHER OPERATOR.