RedactedNarrative: V1 was departing a floating dock when it unintentionally accelerated forward and crashed into the starboard side bow of V2. Occupant told us that the accident occurred when they were trying to launch their Personal Watercraft (PWC). Occupant told us that when Operator 1 pushed the PWC off the floating dock and hopped on, he must have been leaning on the throttle because when he turned the PWC on, they immediately accelerated forward striking the vessel docked next to them and ejecting Operator 1 from the PWC.; Occupant jammed a left index finger; Operator fractured their right wrist.