On the Mountbatten course, we set off in the launch, and I watched several on the course being dragged across the sea, simulating a canopy still extended. Me, wearing the waistcoat dinghy, was silly enough to remark that I wouldn't have to do that. "No" says Jack Flint, "and you wouldn't inflate your life jacket until clear of the chopper", followed by a smart push off the back end of said launch.