While using rented PWC's V-2 came out of a left hand spin and struck V-1.  V-2 was unaware of close proximity of V-1.  V-1 did not see impending accident and was surprised by the impact.  Operator of V-1 was thrown off the PWC.  Operator of V-2 is the father-in-law of operator of V-1.  V-1 was damaged and no damage was discovered on V-2.
Polson                        