do you give them the full saftey course first? I have let two people drive the Tahiti, and both times I gave them a full list of saftey instructions. (wife being one of them). And only my wife attempted to swamp the tahiti, she got off the throttle, and forget to feather the throttle, untill she looked back and saw the wall of water coming.
I remember back in HS down at San Antonio, a friend of mine borrowed another friends v drive Sanger. No instructions, no nothin. Any ways I was on the beach waiting for him to show up with the Sanger, and he decided to show off a little with some high speed passes. Well on one of those passes he hit a wake, while playing with the trim plates, and litteraly stood that Sanger on its tail. He had to change his swim trunks when he came in, and I wouldn't ride with him in it LOL.