Interesting that most accidents involve open motor boats, inc RIBs!! (More of them around I guess).
Although PWCs are in second place, it says that most of the accidents involve other PWCs - so if that trend continues to it's logical conclusion, they will all become extinct soon anyway!!
My PWC near miss (driving it) happened when the other PWC changed direction rapidly whilst entering rough water and both travelling very quickly (although we didn't think that we were that close together) - and as I was airborne at the time, couldn't do anything about it. (I think I shut my eyes, and probably shouted or something.)
It taught me a thing or two about conditions, separation, speed, and PWCs with nobbers driving them
. Luckily no-one was hurt, although my mates swimwear was never quite the same again
(Now more responsible - I'd like to think...)