Veseel 1 was a 11' wave runner pers. Watercraft with 1 person on board.  Vessel 2 was a rented pers. Watercraft with 1 person on board.  Vessel 1 was operating behind vessel 2 both vessel traveling well above wake speed.  Vessel 2 turned his pwc completely around, into the path of vessel 1.  Operator of vessel 1 was unable to maneuver his vessel to avoid striking operator 2.  Both vessel collided almost head on, vessel 1 went over the cowling of vessel 2. The bow of vessel 1 struck operator 2 below his sternum.  The impact threw operator 2 from vessel 2, operator 2 was able to swim to his vessel and climb back on without assistance.  A vessel not involved in the accident or with the group transported operator 2 back to the marina where he was taken by air ambulance to renown medical center in reno.  Victim sustained internal injuries, liver was split; bleeding from right eye after accident.  Operator 1 was not injured.  There was no damage reported for vessel 1.  Estimated damage for vessel 2 $1300.00 breaking the right side view mirror, the right handle bar and leaving scratches in the fiberglass on the right front portion of the vessel.
SOUTH LAKE TAHOE              