I know an F-18 pilot who tells a story of a courtesy ride for an O-6. As a part of the "what do you want to do?" part of the ride the pilot inverted and the backseat wasn't strapped in tight and accidentally grabbed the "get out" handle. Fortunately the system was set up for individual check-out. The pilot landed a convertible back on the carrier, but there was also the problem of an O-6 bobbing around in the Pacific.
There is a story online of that happening with a backseat rider in a French jet too.