RedactedNarrative: Vessel one was being operated towards a no wake zone area in Alton bay when the operator of vessel two was looking behind him at another PWC. An eye witness stated the PWC's were going around in circles right before the collision. The operator of vessel two hit the starboard side mid-ship to vessel one with excessive speed for the area, and was flown into the air. Both vessels were disabled. Both operator's and occupant refused medical treatment at the scene but the operator of vessel one went to the hospital two days later with a shoulder contusion.