RedactedNarrative: Both V1 & V2 were being operated on the main channel of the Mississippi river just north of Lansing. V1 was being operated by Operator1 with passenger on the back.  The vessels were doing tight circles near each other when V2 turned into the path of V1.  It appears that at that time, V1 made contact and ramped V2 just rear of the windshield area.  Operator2 was knocked off of his vessel into the water.V1 realized the victim was in the water & turned around to render aid. Operator1 & passenger V1 occupant pulled the victim out of the water, loaded him onto their PWC and headed to the boat ramp in Lansing.  Witness made contact with V2, which was floating downstream after the incident & towed it to shore.  All 3 individuals were wearing life jackets.  Operator of V1 was tested for alcohol yet registered a 0.00 BAC.  Victim of V2 suffered a broken eye socket, broken nose, broken cheek bone, & broken top & lower jaw.