Approach water's edge at 70mph - apply brakes allowing ABS to operate - boat just flys off roof - simple innit! No need to get feet wet or even get out of the car - teach it all the time! Recovery however is slightly more complicated /forums/images/graemlins/grin.gif
Actually, if you look at the picture, you can see the guy with the T shirt and dark glasses, looking puzzled, is actually a jet skier. He's just upsized his craft, but using the familiar techniques.