A guy a Wellington Point boat ramp near Brisbane reversed his old Landcruiser SWB hardtop and trailer down the ramp, put it into gear and handbrake on. As the weight of the largish boat came onto the trailer, it lifted the rear of the Landcruiser enough to break traction and the whole rig started sliding down the ramp. The owner ran to open the door and jump in, only to find he had automatically locked the door when alighting. Glug, glug, glug. I worked with the guy and once we heard about it, his caring work mates decorated his work station with pictures of submarines, submariners peering through periscopes, ads from defence surplus stores for periscopes, etc.